ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Inorganic Chemistry  (7,462)
  • GEOPHYSICS  (2,541)
  • ASTROPHYSICS  (2,156)
  • Industrial Chemistry  (1,581)
  • 1975-1979  (8,542)
  • 1960-1964  (5,198)
Collection
Keywords
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Meteoritics (1964)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: ASTROPHYSICS
    Type: NASA-TT-F-100 , NAS 1.77:F-100 , AD-A276988
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Overview - Electric fields (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The electric fields session is designed to review progress in observation, theory, and modeling of magnetospheric electric fields, and to expose important new results. The present report comments on the state and prospects of electric field research, with particular emphasis on relevance to quantitative modeling of the magnetospheric processes. Attention is given to underlying theories and models. Modeling philosophy is discussed relative to explanatory models and representative models. Modeling of magnetospheric electric fields, while in its infancy, is developing rapidly on many fronts employing a variety of approaches. The general topic of magnetospheric electric fields is becoming of prime importance in understanding space plasmas.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Lightning apparent source of environmentally important gases (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-79-131 , P79-10129
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Application of space technology to crustal dynamics and earthquake research (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: In cooperation with other Federal government agencies, and the governments of other countries, NASA is undertaking a program of research in geodynamics. The present program activities and plans for extension of these activities in the time period 1979-1985 are described. The program includes operation of observatories for laser ranging to the Moon and to artificial satellites, and radio observatories for very long baseline microwave interferometry (VLBI). These observatories are used to measure polar motion, earth rotation, and tectonic plate movement, and serve as base stations for mobile facilities. The mobile laser ranging and VLBI facilities are used to measure crustal deformation in tectonically active areas.
    Keywords: GEOPHYSICS
    Type: NASA-TP-1464
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Lightning as an indication of storm severity (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: There is a substantial case for the theory that cloud electrification is related primarily to strong convection and the sizeable relative air motion that it implies; therefore, the electrification and subsequent discharge rates can be related to the air motion environment of thunderstorms. The isoceraunic contour map used by the WMO for observing and measuring thunderstorm occurrence contains no information on flash rates, flash density, flash relationship to storm severity, or flash variation with meteorological environment. A constant-view geosynchronous lightning mapper would permit simultaneous studies of the lightning discharge patterns and the meteorological environment of storms, thus establishing whether or not there is a reliable enough relationship to use the observed flash rates and characteristics as supplemental guidance for storm forecast refinement.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 153-155
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    The effect of errors in the assignment of the transmission functions on the accuracy of the thermal sounding of the atmosphere (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: In order to test the error of calculation in assumed values of the transmission function for Soviet and American radiometers sounding the atmosphere thermally from orbiting satellites, the assumptions of the transmission calculation is varied with respect to atmospheric CO2 content, transmission frequency, and atmospheric absorption. The error arising from variations of the assumptions from the standard basic model is calculated.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75654 , Conf. of the Soviet-Am. Working Group on Space Meteorol.; Nov 10, 1976 - Nov 22, 1976; Moscow
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Method for the rapid temperature correction of a transmission in an inhomogeneous atmosphere (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The value of the transmission function in a heterogeneous atmosphere is determined by iterative correction of values in particular layers. The iterative equation and a set of absolute values of errors is presented in two tables.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75649 , Conf. of the Soviet-Am. Working Group on Space Meteorol.; Nov 10, 1976 - Nov 22, 1976; Moscow
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    General properties of HII regions in galaxies (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The structure, electron density, and dimensions of HII regions in galaxies are discussed. These parameters are correlated to the chemical composition gradient along the galactic radius, the dimensions of the three largest HII regions in the galaxy, and the amount of hydrogen in the galaxy, as well as the mass, dimensions, and total optical luminosity of the galaxy. The relationships of HII regions to star formation and galactic nucleus activity are discussed and the kinematic properties of the SB and Sab galaxies are related to the size of HII regions.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75700
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unknown
    On the acceleration of the auroral plasma of the Earth due to conic instability (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The role of electrostatic conic instability in the diffusion of spilled particles and the acceleration of the auroral plasma of the Earth are numerically investigated by means of quasi-linear equations. Linear increments to the conic instability under magnetospheric conditions are introduced. The quasi-linear equation is averaged along tubes of force taking into account the drift across the magnetic field lines. It is shown that the existence of a conic instability leads to small spills and isotropic distribution of particles, but is also accompanied by significant acceleration of electrons.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75638 , PR-430
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    Multicomponent diffusion and energy characteristics of partially ionized plasma in the ionosphere of a planet (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The problem of energy and multicomponent ambipolar diffusion of plasma in the lower ionosphere of a planet with a weak magnetic field is considered.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75409 , PREPRINT-123
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 11
    facet.materialart.
    Unknown
    The magnetic anomaly of the Ivreazone (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A magnetic field survey was made in the Ivreazone in 1969/70. The results were: significant anomaly of the vertical intensity is found. It follows the basic main part of the Ivrea-Verbano zone and continues to the south. The width of the anomaly is about 10 km, the maximum measures about +800 gamma. The model interpretation shows that possibly the anomaly belongs to an amphibolitic body, which in connection with the Ivrea-body was found by deep seismic sounding. Therefore, the magnetic anomaly provides further evidence for the conception that the Ivrea-body has to be regarded as a chip of earthmantle material pushed upward by tectonic processes.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75425
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 12
    facet.materialart.
    Unknown
    Soviet ship arrives next month for joint rocket tests (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-78-71 , P78-10072
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 13
    facet.materialart.
    Unknown
    Transmission functions for various models of the atmosphere for channels of Soviet and American radiometers (15 micron CO2 band) (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Listed are various graphs and tables for illustrations related to Point IX of a list of works conducted by the USSR in accordance with the Joint Soviet-American Research Program on improving methods of thermal sounding from satellites.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75105
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 14
    facet.materialart.
    Unknown
    Joint document concerning geological studies from 1971 - 1975 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: In 1971, a joint Soviet-Americam Working Group on Remote Sensing of the Natural Environment was established. It was organized into a number of discipline panels, one of which was on geology. Membership on this panel came from the Geological Survey of the United States and from the Institute of Geology of the U.S.S.R. Academy of Sciences and Ministry Geology of the U.S.S.R.. During the period 1971-1975, this panel conducted coordinated research in the use of space remote sensing data in the field of geology. A summary of that coordinated research effort is presented.
    Keywords: GEOPHYSICS
    Type: NASA-TM-78318
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 15
    facet.materialart.
    Unknown
    On the possibly overluminous triple star, 13 Ceti (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The star system, 13 Ceti, consists of a short-period visual binary whose primary is itself a single-line spectroscopic binary. Currently existing data regarding the considered stellar system are examined, taking into account certain discrepancies. It is pointed out that the spectral type of the combined light of the system complicates any attempt to explain the observed overluminosity in terms of stellar evolution. Additional studies are recommended to clarify remaining questions concerning the characteristics of the stellar system.
    Keywords: ASTROPHYSICS
    Type: Astronomical Society of the Pacific; vol. 88
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 16
    facet.materialart.
    Unknown
    Satellite to measure equatorial ozone layer (1975)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The Atmosphere Explorer E (Explorer 55) Satellite is described. The satellite will gather information on the earth's upper atmosphere, particularly regarding the condition of the protective ozone layer. The satellite will also provide information concerning the earth's heat balance, and heat flow characteristics, and energy conversion mechanisms.
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-75-290
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 17
    facet.materialart.
    Unknown
    The reaction of the atmosphere to solar disturbances (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The effect of solar flares on the thermosphere and the troposphere is investigated. It is found that during periods of geoeffect solar disturbances, there is a connection between phenomena in the upper and lower atmospheres and that variations in atmospheric parameters correlate with changes in the geomagnetic index.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75500 , All-Union Conf. on Sun Atmosphere Relations in Climate Theory and Weather Forecasts; Oct 30, 1972 - Nov 01, 1972; Moscow
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 18
    facet.materialart.
    Unknown
    Recent results of radio interferometric determinations of a transcontinental baseline, polar motion, and earth rotation (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Results are discussed for radio interferometric observations of extragalactic radio sources with antennas at Haystack Observatory in Massachusetts and the Owens Valley Radio Observatory in California (3900-km baseline) during 14 separate experiments distributed between September 1976 and May 1978. Simultaneous analysis of the data from several experiments yields estimates of changes in the x component of pole position and in earth's rotation (UT1). Comparison with the corresponding results obtained by the Bureau International de l'Heure (BIH) reveals systematic differences. In particular, the trends in the radio interferometric determinations of the changes in pole position are found to agree more closely with those from the International Polar Motion Service and from Doppler observations of satellites than with those from the BIH.
    Keywords: GEOPHYSICS
    Type: Time and the earth''s rotation; Eighty-second Symposium; May 08, 1978 - May 12, 1978; San Fernando; Spain
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 19
    facet.materialart.
    Unknown
    Hydrodynamics of primordial black hole formation (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The hydrodynamic picture of the formation of primordial black holes (PBH) at the early stages of expansion of the Universe is considered. It is assumed that close to singularity, expansion occurs in a quasi-isotropic way. Using an EVM, a spherically symmetrical nonlinear problem of the evolution of primary strong deviation from the Fridman solution was solved. What these deviations must be, so that the formation of PBH occurred was clarified. Attention was devoted to the role of pressure gradients. It is pointed out that at the moment of formation of PBH, only a small part of matter enters into it, primarily the component of perturbation. It is also pointed out that at this moment, the mass of PBH essentially is smaller than the mass considered within the cosmic horizon. The possibility of changing the mass of the PBH as a result of accretion is analyzed.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75918 , PR-347
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 20
    facet.materialart.
    Unknown
    Non-equilibrium processes in interstellar molecules (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The types of nonequilibrium emission and absorption by interstellar molecules are summarized. The observed brightness emission temperatures of compact OH and H2O sources are discussed using the concept of maser amplification. A single thermodynamic approach was used in which masers and anti-masers are considered as heat engines for the theoretical interpretation of the cosmic maser and anti-maser phenomena. The requirements for different models of pumping are formulated and a classification is suggested for the mechanisms of pumping, according to the source and discharge of energy.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75685 , PR-462
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 21
    facet.materialart.
    Unknown
    Global distribution of ozone for various seasons (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A technique which was used to obtain a catalog of the seasonal global distribution of ozone is presented. The technique is based on the simultaneous use of 1964-1975 data on the total ozone content from a worldwide network of ozonometric stations and on the vertical ozone profile from ozone sounding stations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75435
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 22
    facet.materialart.
    Unknown
    Altitudes of the lower edge of the artificial auroral rays on the basis of the observations in the Zarnitsa-2 experiments (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Some results of optical television measurements in the Zarnitsa-2 experiment are presented. The altitudes of the lower edge of artificial auroral rays were determined by the triangulation method and are compared with theoretical calculations of these altitudes based on the Jacchia and CIRA models of the atmosphere.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75631
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 23
    facet.materialart.
    Unknown
    Anomaly of the composition of the F-2 equatorial region of the ionosphere during the hours after sunset according to data from the mass-spectrometer experiment on the Cosmos-274 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A mass spectrometer on board Cosmos-274 measured concentrations of light atoms and ions. While traversing the geomagnetic equator during the evening hours it recorded on anomalous drop in ionized molecular oxygen and ionized atomic oxygen and nitrogen. A similar, less dramatic, decline was observed in the concentration of neutral atomic oxygen. A possible explanation for this and previously observed behavior is an ascent in altitude of the F layer in the hours after sunset, a possibility which is supported by calculations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75615 , PR-331
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 24
    facet.materialart.
    Unknown
    Present status and future prospects for NASA's program in geodynamics (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An overview of NASA's involvement in developing systems for precise determination of polar motion, earth rotation, and position on the earth's surface is given. The observational methods discussed are laser ranging to the moon and to artificial satellites, and very long baseline microwave interferometry. A plan for a geodynamics program to apply space technology to research in earth dynamics is outlined.
    Keywords: GEOPHYSICS
    Type: Ohio State Univ. Appl. of Geodesy to Geodyn., an Intern. Symp.; p 39
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 25
    facet.materialart.
    Unknown
    Internal gravity waves in the upper atmosphere, generated by tropospheric jet streams (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A mechanism of internal gravity wave generation by jet streams in the troposphere is considered. Evaluations of the energy and pulse of internal gravity waves emitted into the upper atmosphere are given. The obtained values of flows can influence the thermal and dynamic regime of these layers.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75407
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 26
    facet.materialart.
    Unknown
    The Soviet-American Conference on Cosmochemistry of the Moon and Planets, Part 2 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The origin and evolution of the solar system is discussed based on ground and satellite observations.
    Keywords: ASTROPHYSICS
    Type: NASA-SP-370-PT-2 , LC-75-600013 , Soviet-American Conference on Cosmochemistry of the Moon and Planets; Jun 04, 1974 - Jun 08, 1974; Moscow; Russia
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 27
    facet.materialart.
    Unknown
    Inversion Methods in Atmospheric Remote Sounding (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The mathematical theory of inversion methods is applied to the remote sounding of atmospheric temperature, humidity, and aerosol constituents.
    Keywords: GEOPHYSICS
    Type: NASA-CP-004 , Dec 15, 1976 - Dec 17, 1976; Hampton, VA; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 28
    facet.materialart.
    Unknown
    Simultaneous equatorial observations of 1- to 30-Hz waves and pitch angle distributions of ring current ions (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Eighteen events of large-amplitude (0.4-6 gammas) waves which may be propagating in the ion cyclotron mode have een observed by Explorer 45. Comparison with simultaneously measured proton distributions has allowed the events to be divided into two categories. The first category consists of waves accompanied by enhanced ion fluxes apparently injected into the plasmasphere with anisotropic pitch-angle distributions. This simultaneity suggests that these waves may be generated by the observed ring-current ions. Waves in the second category were found near or outside the plasmapause and were not correlated with any identifiable changes in the observed proton distribution. The generation mechanism for these waves remains unknown.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 81; Dec. 1
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 29
    facet.materialart.
    Unknown
    X-ray bursts - The maximum mass of a neutron star (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A review of the great variety of observed properties of X-ray burst sources is presented, including the MXB 1730-355, called the rapid burster. Hypotheses regarding the sources of bursts are discussed, and two models for the rapid burster are described. The first postulates that they are caused by a collapsed object with a mass of approximately 10 solar masses surrounded by a disk of gas spiralling inward. The second posits a neutron star with a strong magnetic field. Theoretical questions regarding the mass of neutron stars are discussed, and prerequisites for such research are identified. Various research projects investigating these questions are described.
    Keywords: ASTROPHYSICS
    Type: Mercury; 6; July-Aug
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 30
    facet.materialart.
    Unknown
    Explorer 45 wave observations during the large magnetic storm of August 4-5, 1972 (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The magnetospheric compression associated with the very large magnetic storm of August 4-5, 1972, provided an opportunity for Explorer 45 to observe plasma waves in the magnetosphere and the magnetosheath during extremely disturbed conditions. Electrostatic noise bursts were observed near the plasmapause in electric-field channels from 35 Hz to 5.62 kHz. In the outer magnetosphere, electric-field noise bands apparently harmonically related to the electron gyrofrequency with components as low as 3 kHz and as high as 50 kHz were observed. The electric field of the fundamental was perpendicular to the magnetic-field vector. A mechanism including the electron cyclotron instability may generate the noise band. Hiss of 100-1000 Hz was observed in the outer magnetosphere. The electromagnetic hiss was generally weak and was observed in the magnetic wide-band data only when it was strong. In the magnetosheath broad band, incoherent noise (hiss) was observed from 1 Hz to 100 kHz. This magnetosheath hiss was the strongest phenomenon observed by the plasma-wave detectors during the lifetime of Explorer 45. The highest intensities of magnetosheath hiss occurred at the magnetopause. Its broad-band nature suggests that magnetosheath hiss was generated locally. Broad-band noise bursts and short bursts of chorus were also observed in the magnetosheath.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 82; Jan. 1
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 31
    facet.materialart.
    Unknown
    Contraction of the Orion Nebula cluster-molecular cloud A complex (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Observational evidence is presented in support of the view that the width of the molecular lines in Orion is produced by a contraction of the cloud with a velocity directly proportional to the distance from the cloud center. The main support is provided by close agreement between the motions of the cloud and that of the stars embedded in it. A further implication of this agreement is that star formation occurred throughout the Orion cloud, rather than only in the dense center as predicted by the conventional picture of star formation.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 217
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 32
    facet.materialart.
    Unknown
    Tables of spectral transmission of the atmosphere in the 2660-2750 cm(-1) and 810-980 cm(-1) ranges (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Thermal sounding data from satellites are presented together with a description of transmission function calculations. Tables contain experimental values for transmission of the entire thickness of the atmosphere for two regions of the spectrum: at 2660 to 2750 cm/1 and at 810 to 980 cm/1. The spectrum was recorded on an infrared spectrophotometer.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75104
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 33
    facet.materialart.
    Unknown
    National Geodetic Satellite Program, Part 1 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The work performed by individual contributors to the National Geodetic Satellite Program is presented. The purpose of the organization, the instruments used in obtaining the data, a description of the data itself, the theory used in processing the data, and evaluation of the results are detailed for the participating organizations.
    Keywords: GEOPHYSICS
    Type: NASA-SP-365-PT-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 34
    facet.materialart.
    Unknown
    NASA, Soviet joint sounding rocket tests (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-77-151 , P77-10150
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 35
    facet.materialart.
    Unknown
    Radiometer at a frequency of 108-120 GHz for study of the earth's atmosphere (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Calculated and experimental design and operating characteristics of a 108-120 GHz superheterodyne radiometer with intermediate frequency modulation and a second harmonic frequency converter are presented and discussed. With a 1 sec time constant, the radiometer fluctuation sensitivity threshold is 1 K, without degradation in 2 hours of operation. Graphs of frequency variations, calibration, conversion loss, rectified current, fixed bias voltage, and contact needle impedance are included.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75562 , PR-281
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 36
    facet.materialart.
    Unknown
    On the possibility of analytical approximation of line forms during random disorders of the resonance frequencies in molecular vibration-rotation spectra for satellite sounding (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The generalization spectral line contour concept and formulas for a two component mixture, as well as consequences of the general formula are discussed. The calculation procedure, initial information, calculation results and comparison of calculations with available experimental data, for radiation absorption in three CO2 bands are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75655
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 37
    facet.materialart.
    Unknown
    Study of the 10 micron continuum of water vapor (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Radiation attenuation by atmospheric water vapor is considered. A formula based on laboratory data is recommended for approximating continuous absorption in the spectra region in question. Data of full scale measurements and laboratory experiments are compared. It was concluded that only molecular absorption need be taken into account under clear atmospheric conditions during the warm part of the year, while in winter or in cloudy conditions, the effect of aerosol can be significant.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75650
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 38
    facet.materialart.
    Unknown
    Results of the measurement of the vertical profile of ozone up to a height of 70 km by means of the MR-12 and M-100 sounding rockets (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The photometers used and methods of calculation of the vertical ozone concentration profile are described. The results obtained in several series of MR-12 and M-100 sounding rocket launchings are presented and discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75380
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 39
    facet.materialart.
    Unknown
    SAGE to examine Earth's stratosphere (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The SAGE mission is discussed along with the role of the Nimbus 7 experiment. Other topics discussed include: ground truth measurements, data collection and processing, SAGE instrumentation, and launch sequence.
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-79-6 , P79-10006
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 40
    facet.materialart.
    Unknown
    Direct method for solving transfer equation by expansion in spherical harmonics: Scattering in atmosphere with Lambertian lower boundary and thermal radiation transfer (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The direct method for the solution of the spherical harmonics approximation to the equation of transfer of radiation is applied to the cases of (1) scattering of the solar radiation in the atmosphere with the Lambertian boundary and (2) thermal radiation transfer.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75549 , PR-307
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 41
    facet.materialart.
    Unknown
    Evolution of the moon: The 1974 model (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The interpretive evolution of the moon can be divided now into seven major stages beginning sometime near the end of the formation of the solar system. These stages and their approximate durations in time are as follows: (1) The Beginning: 4.6 billion years ago, (2) The Melted Shell: 4.6 to 4.4 billion years ago, (3) The Cratered Highlands: 4.4 to 4.1 billion years ago, (4) The Large Basins: 4.1 to 3.9 billion years ago, (5) The Light-colored Plains: 3.9 to 3.8 billion years ago, (6) The Basaltic Maria: 3.8 to 3.0(?) billion years ago, and (7) The Quiet Crust: 3.0(?) billion years ago to the present. The contributions of the Apollo and Luna exploration toward the study of those stages of evolution are reviewed.
    Keywords: ASTROPHYSICS
    Type: The Soviet-Am. Conf. on Cosmochem. of the Moon and Planets, pt. 1; p 63-80
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 42
    facet.materialart.
    Unknown
    Chemistry between the stars (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: A unit is presented for the secondary school teacher of physics, chemistry, astronomy, or earth sciences. Included are a list of reference materials, teaching aids, and projects. Discussion questions and a glossary are also provided. Concepts developed are: the nature of interstellar space, spectroscopy, molecular signals from space and interstellar molecules and other areas of astronomy.
    Keywords: ASTROPHYSICS
    Type: NASA-EP-127
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 43
    facet.materialart.
    Unknown
    Results of measurement of the night corpuscular flux on the MR-12 rockets in the JASPIC project (Soviet part of the program) (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: In June 1978, a joint Soviet-American project (JASPIC) was conducted, the goals of which were: (1) the study of the flows of spilling electrons which act upon the middle-latitude ionosphere under nocturnal conditions (nocturnal corpuscular source of ionization); and (2) the mutual comparison of procedures for recording corpuscular radiations in the upper atmosphere, using meteorological and geophysical rockets.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75691
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 44
    facet.materialart.
    Unknown
    Problems with the interpretation of paleomagnetic measurements due to studies of basalts from the Paleovolcano Vogelsberg in Hessen (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The palaeomagnetic parameters of more than 5,000 samples of cores taken from 33 drilling holes through innumerable basalt units of the Vogelsberg Paleovolcano in Hessen were measured. Measurements of specimens of thin and thick layers without any gap proved that inclination, natural remanence, susceptibility and Konigsberger factor were dependent on their distance from the surface of units, layers, lamelles, etc. Therefore, representative data for the evaluation of palaeomagnetic measurements can be expected only in the interior part of lava flows and intrusions. The statistic method which enclosed all values of measurements gave significant data which was not appropriate for the interpretation of palaeomagnetic and geological events.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75355
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 45
    facet.materialart.
    Unknown
    Vector diagram of the chemical compositions of tektites and earth lavas (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The chemical compositions of tektites and various volcanic glasses, similar in composition to tektites are compared by a petrochemical method. The advantage of the method is that a large number of chemical analyses of igneous rocks can be graphically compared with the help of vectors, plotted in relation to six parameters. These parameters, calculated from ratios of the main oxides given by silicate analysis, reflect the chief characteristics of igneous rock. Material for the study was suppled by data from chemical analysis characterizing tektites of all known locations and data from chemical analyses of obsidians similar in chemical composition to tektites of various petrographical provinces.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75371
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 46
    facet.materialart.
    Unknown
    Tectonic asymmetry of the earth and other planets (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The structures of Earth, Mars, Venus, and the Moon are examined and compared. Global tectonic characteristics are presented for each. A comparison of the tectonics reveals the structural asymetry of these planets and the moon. Tectonic asymmetry information for the group is used to interpret certain aspects of the earth's geological past.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75576
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 47
    facet.materialart.
    Unknown
    Optical characteristics of the earth's surface and atmosphere from the point of view of the remote sensing of natural resources: Review of the contemporary status of the problem (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Widely used remote probing methods, and especially the multispectral method, for studying the earth from aerospace platforms necessitate the systematization and accumulation of data on the relationships between remote observations and measured parameters and characteristic properties and conditions of phenomena on the earth's surface. Data were presented on the optical characteristics of natural objects which arise during observations of these objects over a wide spectral interval which encompasses solar radiation reflected by the object as well as the object's inherent thermal radiation. The influence of the earth's atmosphere on remote measurements and several problems in simulation and calculation are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75548 , PR-287
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 48
    facet.materialart.
    Unknown
    Stellar map of neolithic man (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Observations made by ancient man are of great interest to present day astronomers. Drawings made by neolithic man in caves show a surprising sense of perspective. The discoveries in the Fern Grotto in California are of special interest. Photographs of cave drawings are included.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75468
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 49
    facet.materialart.
    Unknown
    Scientisits analyze possible comet dust (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Keywords: ASTROPHYSICS
    Type: NASA-NEWS-RELEASE-79-128 , P79-10127
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 50
    facet.materialart.
    Unknown
    International rocket project to compare ozone sensors (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-79-130 , P79-10128
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 51
    facet.materialart.
    Unknown
    On the emission of neutrinos and gravitational waves in the formation of neutron stars (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The various modes in which the energy generated by the formation of a neutron star or black hole due to collapse of a stellar core can appear are investigated, and physical constraints are placed on this energy distribution by noting that neutron stars appear to have been found in at least six X-ray binaries and one binary pulsar. The energy generated by a supernova during the collapse of a stellar core to a neutron star is considered along with the manner in which this energy is distributed in the different modes. It is shown that the gravitational binding energy of a neutron star is converted mostly into kinetic energy of rotation or is emitted as neutrinos, gravitational waves, or both. The energy release through mass ejection and cosmic rays is suggested to be no more than a few percent of the total energy involved. A possible scenario is outlined for the case where the initial rotation velocity of the collapsing core exceeds some critical limit. It is concluded that gravitational radiation will be the ultimate outlet for most of the binding energy in this case.
    Keywords: ASTROPHYSICS
    Type: Astrophysics and Space Science; 51; 1, Se; Sept
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 52
    facet.materialart.
    Unknown
    Microseismic study of the interandine valley between Latacunga and Cuayllabamba (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The present state of two active volcanoes and the principal active seismic faults in a 100 km area from Quito to Toacaso, Ecuador was studied. A brief seismic history of the region is reviewed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75370
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 53
    facet.materialart.
    Unknown
    Effect of solar activity on the frequency of occurrence of major anomalies in the Arctic (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Major air pressure and temperature anomalies in certain arctic regions were studied with a view toward predicting their occurrence. Correlations are sought between the frequency of arctic anomalies and solar activity, or specifically the Wolf number and the index of geomagnetic disturbance. Graphic techniques are used to show that solar activity has a definite influence on the frequency of occurrence of major anomalies of pressure and temperature in the Arctic.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75347
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 54
    facet.materialart.
    Unknown
    Results of special mechanical analyses of Luna 16 material (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The studies carried out on the Luna 16 regolith have confirmed the data that were already published internationally. By means of activation analysis under irradiation in the reactor, activation analysis with a 14 MeV U-generator, and mass spectroscopy on samples of 10 or 20 mg, six main and 63 trace elements were quantitatively determined and compared with known data.
    Keywords: ASTROPHYSICS
    Type: The Soviet-Am. Conf. on Cosmochem. of the Moon and Planets, Pt. 2; p 697-702
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 55
    facet.materialart.
    Unknown
    The NASA program on upper atmospheric research (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The purpose of the NASA Upper Atmospheric Research Program is to develop a better understanding of the physical and chemical processes that occur in the earth's upper atmosphere with emphasis on the stratosphere.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-74608
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 56
    facet.materialart.
    Unknown
    Observations of the transient X-ray source 4U 0115+63 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: Results are presented for HEAO A-2 pointed observations and Ariel 5 A11-Sky Monitor observations of the X-ray transient 4U 0115 + 63. The transient source pulses with a period of 3.6136 s + or - 0.0004 s, has a hard spectrum typical of an X-ray binary pulsar, and has a broad iron line emission feature. A discussion of the transient behavior is given, and inferences are made concerning the nature of the X-ray source based on the pointed data.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 231
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 57
    facet.materialart.
    Unknown
    Metal abundance in the Praesepe and Hyades clusters (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: Calcium K-line photometry is reported for 27 A-type stars in the Praesepe cluster, and the data obtained are compared with previous K-line observations of Hyades stars. It is found that calcium and other metals are generally overabundant in Praesepe relative to field stars and that there is a considerable scatter in metal-abundance indices. Comparison with the Hyades results indicates that the Praesepe stars are as metal-enriched as the Hyades stars. These results are taken as evidence favoring Eggen's (1960) proposal that the Hyades and Praesepe clusters should be regarded as a single group having, on the average, about a factor-of-two higher metal abundance than solar-neighborhood field stars as well as a high internal dispersion in metal-line strengths. The questions of where and how the Praesepe-Hyades stars acquired their high average metal abundances, K-line strengths, and associated dispersions are briefly considered.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 214
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 58
    facet.materialart.
    Unknown
    Evolution of the Solar System (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The origin and evolution of the solar system are analyzed. Physical processes are first discussed, followed by experimental studies of plasma-solid reactions and chemical and mineralogical analyses of meteorites and lunar and terrestrial samples.
    Keywords: ASTROPHYSICS
    Type: NASA-SP-345
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 59
    facet.materialart.
    Unknown
    Effects of tidal distortion on binary-star velocity curves and ellipsoidal variation (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: Radial velocity curves for the more massive components of binaries with extreme mass ratios can show a large distortion due to tides, as first recognized by Sterne. Binaries in which the effect is large should be rare because nearly all such binaries would be in the rapid phase of mass transfer. However, the optical counterparts of some X-ray binaries may show the effect, which would then serve as a new means of extracting considerable information from the observations. The essential parts of the computational procedure are given. Light curves for ellipsoidal variables with extreme mass ratios were also computed, and were found to be less sinusoidal than those with normal mass ratios.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 203; Jan. 1
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 60
    facet.materialart.
    Unknown
    Jovian magnetic fields is complex, Pioneer 11 shows (1975)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: An analysis of the magnetic field of the planet Jupiter is presented. The data are based on the information returned by Pioneer 11 space probe. It was determined that the magnetic field stretches across 9 million miles of space at some times and shrinks in volume by three-fourths or more at other times. It was also determined that electrons trapped in the magnetic field of Jupiter are 10,000 times more intense than those in the Van Allen radiation belts which circle the earth. Additional data were obtained on the polar regions, atmospheric circulation, and the nature of the moons.
    Keywords: ASTROPHYSICS
    Type: NASA-NEWS-RELEASE-75-49
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 61
    facet.materialart.
    Unknown
    Global Aspects of the Earth's Magnetopause (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-14
    Description: Measurable characteristics of the magnetopause are discussed. The Earth's magnetopause is a thin magnetic discontinuity separating the shocked, magnetized plasma of the solar wind from a more tenuous plasma contained by the geomagnetic field. This external magnetosheath plasma flows around the magnetosphere with characteristics that are in approximate agreement with gas dynamic theory. The interplanetary magnetic field carried by this plasma becomes draped over the magnetosphere and its orientation relative to the local geomagnetic field determines the local magnetopause current. Solar wind pressure and interplanetary field direction control the geocentric distance to the magnetopause with high pressures and southware fields moving the equatorial magnetopause to a more earthward location. Evidence suggests that the magnetopause is Kelvin-Helmholtz unstable and surface waves are propagating toward the magnetotail.
    Keywords: GEOPHYSICS
    Type: ESA Magnetospheric Boundary Layers; p 5-13
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 62
    facet.materialart.
    Unknown
    Scanning Electron Microscopy and Petrography of Glassy Particles Produced by Lava Fountain Eruptions (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A conceptual model of a lava fountain consists of a vent, spatter ramparts, fountain column, downwind plume and associated pumice deposits. Glassy particles produced by lava fountain eruptions consist primarily of sideromelane glass and minor to moderate amounts of vesicles and crystals. Particles are classified on the basis of morphology as: (1) spherical, (2) elongate, (3) glass-coated mineral grain, (4) shard, (5) reticulite, (6) composite particle, and (7) lithic fragment.
    Keywords: GEOPHYSICS
    Type: NASA-CR-160101 , CONTRIB-325
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 63
    facet.materialart.
    Unknown
    Very Long Baseline Interferometry Applied to Polar Motion, Relativity and Geodesy (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: The causes and effects of diurnal polar motion are described. An algorithm is developed for modeling the effects on very long baseline interferometry observables. Five years of radio-frequency very long baseline interferometry data from stations in Massachusetts, California, and Sweden are analyzed for diurnal polar motion. It is found that the effect is larger than predicted by McClure. Corrections to the standard nutation series caused by the deformability of the earth have a significant effect on the estimated diurnal polar motion scaling factor and the post-fit residual scatter. Simulations of high precision very long baseline interferometry experiments taking into account both measurement uncertainty and modeled errors are described.
    Keywords: GEOPHYSICS
    Type: NASA-TM-79582
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 64
    facet.materialart.
    Unknown
    Missile impact craters (White Sands Missile Range, New Mexico) and applications to lunar research: Contributions to astrogeology (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: No abstract available
    Keywords: GEOPHYSICS
    Type: USGS-PAPER-812-B , LC-75-619096
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 65
    facet.materialart.
    Unknown
    The coordinated federal program for the application of space technology to crustal dynamics and earthquake research (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The application of space technology to important problems relating to crustal dynamics and earthquake research is described. Federal plans for such applications are summarized.
    Keywords: GEOPHYSICS
    Type: NASA-TM-82215
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 66
    facet.materialart.
    Unknown
    Propagation of waves in a medium with high radiation pressure (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The propagation and mutual transformation of acoustic and thermal waves are investigated in media with a high radiative pressure. The equations of hydrodynamics for matter and the radiative transfer equations in a moving medium in the Eddington approximation are used in the investigation. Model problems of waves in a homogeneous medium with an abrupt jump in opacity and in a medium of variable opacity are presented. The characteristic and the times of variability are discussed. Amplitude for the brightness fluctuations for very massive stars are discussed.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75679 , PR-421
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 67
    facet.materialart.
    Unknown
    Rotating black holes tied to huge energy bursts (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Keywords: ASTROPHYSICS
    Type: NASA-NEWS-RELEASE-79-105 , P79-10104
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 68
    facet.materialart.
    Unknown
    On the continuing stellar formation in the central regions of some globular clusters and their relation to the pulsars (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The discrepancy between the predicted and observed quantities of gas in the central regions of massive globular clusters is discussed. It is hypothesized that star formation continues in the central regions by means of gas released during stellar evolution or trapped by the central region when the globular clusters pass through the center of the galaxy. Nine globular clusters are indicated at distances less than 1000 ps from which radio pulsars or X-ray sources are observed. It is argued that they could have formed relatively recently in closed pairs in the central regions and then ejected at the stage of supernova bursts with velocities over 100 ks/s.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75703 , PR-313
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 69
    facet.materialart.
    Unknown
    Magsat: A satellite for measuring near earth magnetic fields (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Magsat, designed for making measurements of the geomagnetic vector field, is evaluated. For accurate vector measurements the attitude of the fluxgate magnetometer will be determined to about 15 arc-seconds. Expected measurement accuracy will be 6 (gamma) in each component and 3 in magnitude. The Magsat data will be applied to solid earth studies including modeling of the Earth's main magnetic field, delineation of regional magnetic anomalies of crustal origin, and interpretation of those anomalies in terms of geologic and geophysical models. An opportunity will be presented to the scientific community to participate in data use investigations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-71370 , X-922-97-199 , Gen. Sci. Assembly of the Intern. Assoc. of Geomag. and Aeronomy; Aug 22, 1977 - Sep 03, 1977; Seattle
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 70
    facet.materialart.
    Unknown
    Exploding stars, pulsars and black holes in space (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Brief factual reviews are provided for supernovae, pulsars and neutron stars, and black holes. Also discussed in general terms are red giants, white dwarfs, quasars and radio galaxies.
    Keywords: ASTROPHYSICS
    Type: NASA-NEWS-RELEASE-77-243 , P77-10242
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 71
    facet.materialart.
    Unknown
    NASA laser systems to study earth's crustal movements (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-79-117 , P79-10116
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 72
    facet.materialart.
    Unknown
    Planets of the solar system (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Venera and Mariner spacecraft and ground based radio astronomy and spectroscopic observations of the atmosphere and surface of venus are examined. The composition and structural parameters of the atmosphere are discussed as the basis for development of models and theories of the vertical structure of the atmosphere, the greenhouse effect, atmospheric circulation and cloud cover. Recommendations for further meteorological studies are given. Ground based and Pioneer satellite observation data on Jupiter are explored as well as calculations and models of the cloud structure, atmospheric circulation and thermal emission field of Jupiter.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75299
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 73
    facet.materialart.
    Unknown
    New observations of interstellar abundances and depletions of boron, vanadium, chromium, and cobalt (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: New observations of interstellar lines of boron, vanadium, chromium, and cobalt in the spectra of Zeta Oph and Xi Per have been obtained with the Copernicus satellite. Chromium has been detected for the first time toward a reddened star, and cobalt has been seen for the first time in any interstellar line of sight. New limits have been obtained for boron and vanadium. These new data, along with limits on scandium and other species from the literature, have been compared with models for the depletion process. No fully conclusive test of depletion models is yet possible, but the new data on boron appear to favor the hypothesis that the depletions are dominated by accretion of gas-phase particles onto grains, rather than being due to grain condensation under pressure equilibrium. The impact of these new data on the study of grain surface properties is described.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 234
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 74
    facet.materialart.
    Unknown
    Determination of the ozone profile from the outgoing thermal emission (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Problems of the information content of measuring the spectral and angular distribution of the outgoing thermal emission of the atmosphere-earth system in the 9.6 mm ozone absorption band are discussed. Two methods (nadir and limb) of remote measurement are considered. Information data obtained are evaluated according to three systems. Effectiveness of the regression interpretation method using the data of nadir and limb measurements is shown.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75279
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 75
    facet.materialart.
    Unknown
    The search for, and study of black holes in the galaxy (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The study of the short-term (less than 10 s) time variability of Cygnus X-1 is reviewed, with attention given to measurements of the autocorrelation function and of the cross-correlation between different energy bandwidths, as well as to a simple shot noise model for describing all such short-term variations. Observational questions with regard to Cygnus X-1 are discussed, relating to the average shape of the randomly occurring flares, energy dependence in the cross-correlation and the dependence on energy of the X-ray polarization. Concerning the study of the Cyg X-1-like aperiodic X-ray sources, an estimate is made of what can be accomplished at the limits of sensitivity where Poisson fluctuations are at least as important as the intrinsic variability of the source, considering the third moment due to the source fluctuations.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 76
    facet.materialart.
    Unknown
    Temporal studies of compact galactic X-ray sources (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Advances in X-ray astronomy due to temporal studies are discussed. Attention is given to X-ray temporal variability categorized into periodic, quasi-periodic, and chaotic. Approximately 95% of all known X-ray sources exhibit chaotic variability, in which there is no apparent pattern or periodicities. The orbits of seven binary X-ray sources are presented, along with empirical findings of neutron star masses. In addition, the interior structure of a supergiant star, HD 77581, is investigated by attempting to measure its apsidal motion. Graphs are provided for the power density spectrum of 4U 1626-67, GX301-2 Doppler delay data, and empirically determined error contours for the mass and radius of four companions stars in X-ray binary systems.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 77
    facet.materialart.
    Unknown
    Soft X-ray observations of degenerate dwarfs and cataclysmic variables (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Observations in outburst of two dwarf novae, SS Cyg and U Gem, reveal soft, pulsed X-ray emission greatly enhanced over the emission present during the quiescent periods. In order to characterize the nature of the X-ray pulsations a random phase analysis was carried out, which indicated the phase of SS Cyg behaved like a random variable with zero mean and an r.m.s. value that increased with the square root of the time. Attention is also given to the properties of the detected dwarf novae during optical quiescences, to isolated white dwarfs, and to optical observations of AM Her. It is concluded that the dwarf novae, which occur in binary systems, appear to be controlled by the varying accretion of matter generated by the main sequence companion, and that the X-ray emission during outburst appears to consist of two separate components: a periodically varying (on about a 10 s timescale) soft component, together with a more slowly randomly varying hard component.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 78
    facet.materialart.
    Unknown
    Degenerate dwarf X-ray sources (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: X-ray emission by accreting degenerate dwarfs is examined qualitatively, considering bremsstrahlung and cyclotron fluxes and cooling. Also discussed are strongly magnetic degenerate dwarfs, which are characterized by a blackbody-limited UV cyclotron component and a hard X-ray bremsstrahlung component, both produced by the hot emission region, and a hard UV or soft X-ray blackbody component produced by cyclotron and bremsstrahlung photons. With regard to nonmagnetic and weakly magnetic degenerate dwarfs, it is concluded that degenerate dwarfs can produce larger luminosities than earlier estimates indicated, that even high mass stars can produce low temperature (less than 10 keV) X-ray spectra, and, for moderate and high accretion rates and high (greater than 1.2 solar masses) stellar masses, the spectra exhibit a high energy tail. Individual sources of each type of dwarf are considered, such as the AM Her, DQ Her and SS Cyg classes as well as Cyg X-2 and the Sco X-1 class, and the number of such sources in the Galaxy is estimated.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 79
    facet.materialart.
    Unknown
    Balloon-borne atmospheric spectral measurements (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Infrared solar spectra, with .02 per cm resolution, were collected during sunset from a balloon at 40 km on October 27, 1978. Portions of the data obtained during the flight have been compared with theoretical calculations made using the data on the AFGL tape. The results of these comparisons reveal a number of areas of disagreement between theory and experimental results. The areas of disagreement are discussed in detail.
    Keywords: GEOPHYSICS
    Type: Atmospheric effects on radiative transfer; August 29, 30, 1979; San Diego, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 80
    facet.materialart.
    Unknown
    The thermonuclear-flash model for X-ray burst sources - A new tool for observing neutron stars (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The helium-flash model for X-ray burst sources, in which matter is presumed to accrete onto the surface of a neutron star, is discussed. Attention is given to the accretion process, nuclear burning, X-ray emission, and the energy released by convection as well as by radiative diffusion near the surface. The rise times of observed bursts, their spectral evolution, and the properties of the spectrally soft X-ray transients are considered. Problems in interpreting the continuum spectra are discussed, along with problems in the detection and measurement of line features in the spectra. Also considered are the ratio of time-averaged persistent luminosity to time-averaged burst luminosity, peak burst luminosities, and the possibility of detecting binary membership for burst sources.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 81
    facet.materialart.
    Unknown
    Prospects for experimental research on black holes in binary systems (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Cygnus X-1, the single widely accepted example of a black hole in a binary system, is characterized by unusual X-ray properties. The X-ray spectrum of Cygnus X-1 is not cut off above 20 keV, as in most strong X-ray sources. Recent scintillation counter measurements reveal a power law spectrum extending from 40 to 200 keV with a photon spectral index of approximately 2.2. However, it is not clear that these and other X-ray properties of the system are related to the black-hole nature of Cygnus X-1. It is suggested that without a direct test to show that the mass of the compact object in other systems similar to Cygnus X-1 (Circinus X-1 and GX339-4) exceeds the limit of the neutron star mass, a better understanding of the accretion disk phenomenon must be achieved to demonstrate how the properties peculiar to these systems are related to the black hole nature of the compact object. Current accretion disk models are examined, including the alpha-accretion disk and two-temperature accretion disk models.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 82
    facet.materialart.
    Unknown
    X-ray pulsar spectroscopy - Observational prospects (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Three experimental concepts have been suggested to advance the study of X-ray pulsar spectroscopy. They are: (1) a higher bit rate for pulse phase spectroscopy; (2) an emphasis on the 10 keV 'pulsar surface' emission, and (3) an improved resolution to understand the nature of broadened iron lines in pulsars. It is shown that for conventional X-ray spectroscopy at least 5 KB/s are needed to substantially improve pulse phase spectroscopy; the broadened iron line emission in the pulsar spectra will require improved spectral resolution at 6.7 keV to discriminate among the models for this emission. It is concluded that this work will elucidate the physics of neutron star surface and circumstellar X-ray emission.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 83
    facet.materialart.
    Unknown
    Degenerate dwarfs in future hard X-ray experiments (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The hard X-ray characteristics of weak sources (dwarf novae and AM Her-like), and strong steady sources, are discussed. HEAO A2 light curves for the greater than 2 keV flux from SS Cygni are presented, along with the pulse height spectrum and inferred incident spectrum. With regard to the high luminosity degenerate dwarf candidates, it is noted that only for Sco X-1 and Cyg X-2 has even optical evidence for binary periodicity been seen. The attributes of suitable X-ray experiments are reviewed, concerning the simultaneous observation of low energy X-rays, a large area for studying short flares, low background, and the need for both broad band spectral response and high resolution.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D.C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 84
    facet.materialart.
    Unknown
    Compact galactic X-ray sources; Proceedings of the Workshop, Washington, D.C., April 20, 21, 1979 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The current status and future prospects regarding the study of compact galactic X-ray sources are reviewed; key questions addressable by X-ray observations are outlined, and various proposed types of missions are evaluated in terms of their ability to address these questions. Subjects discussed include degenerate dwarfs and cataclysmic variables, bursters, neutron stars, black holes, and erratic variables, transients, and patrol programs. Specific topics include future X-ray observations of magnetic binaries, the thermonuclear-flash model for X-ray burst sources, neutron star X-ray sources, prospects for experimental research on black holes in binary systems, and compact X-ray source observations after Explorer with the LAMAR.
    Keywords: ASTROPHYSICS
    Type: Compact galactic X-ray sources; April 20, 21, 1979; Washington, D. C.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 85
    facet.materialart.
    Unknown
    Ultrahigh energy neutrinos from galactic neutron stars (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: An attempt is made to estimate the production rate of ultrahigh energy (UHE) neutrinos from galactic neutron stars. The statistics of various stellar populations are reviewed as well as an evolutionary scheme linking several neutron star environments. An observational test for predicting stellar evolution is made using two mass ratio intervals of less than 0.3 and greater than or approximately equal to 0.3, which is supported by kinematical evidence. Attention is given to the problem of the target material that is required by UHE protons accelerated from the pulsar's surface to their rotational kinetic energy, and to the detectability of neutron stars in the UHE neutrinos by employing the deep underwater muon and neutrino detector (DUMAND) array.
    Keywords: ASTROPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 86
    facet.materialart.
    Unknown
    Classification and generation of terrestrial rare gases (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A Kr-84/Xe-130 versus Ne-20/Ar-36 diagram is a very useful format with which to study the elemental ratios of rare gases from terrestrial materials. It can separate not only the three types of rare gases which Ozima and Alexander (1976) classified but also the 'planetary' type rare gases from the other three types of rare gases. When all the available terrestrial rare gas data are plotted in a Kr-84/Xe-130 versus Ne-20/Ar-36 diagram, several observations can be made. First, most of the analyses of rare gases from shales yield Kr-84/Xe-130 ratios between the 'planetary' and atmospheric values. If, however, the atmosphere's high Kr-84/Xe-130 ratio was produced by the selective adsorption of xenon onto shales from an initially 'planetary' atmosphere, as is widely accepted, then the Kr-84/Xe-130 ratio in shales should be even lower than the 'planetary' value. Second, the rare gas pattern in the quenched rims of submarine basalts may be explained as fractionated samples of the rare gases in sea water.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 87
    facet.materialart.
    Unknown
    Global atmospheric sampling program - Prospects for establishing a tropospheric ozone budget from commercial aircraft data (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A preliminary analysis of zonally averaged, ozone concentration data obtained from commercial (GASP) aircraft between the equator and 60 deg North indicates that ozone in the upper troposphere exhibits a primary maximum during the spring, and, in middle latitudes, a secondary maximum in the summer of both 1975 and 1976. A late-fall/early-winter minimum also appears and seems consistent with previous upper air measurements. The April ozone maximum has been well documented and appears at the time when the stratospheric ozone content is greatest and cyclogenetic activity is most vigorous. However, the secondary maximum in June has not been widely observed or quoted as a unique feature. It is hypothesized that the rapid ascent of the tropopause between midspring and summer could account for the incorporation of ozone-rich, stratospheric air into the upper troposphere with a subsequent dilution during the following months. This may explain certain aspects of the annual ozone cycle in the lower troposphere which occasionally exhibit a bimodal distribution during the warm season.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 88
    facet.materialart.
    Unknown
    Distribution of atmospheric ozone and how it is measured (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The total amount of ozone in a vertical column has been measured spectroscopically at near ultraviolet and visible wavelengths, using ground- and satellite-based instruments. The vertical distribution of ozone from the surface up to approximately 100 km has been measured by a variety of techniques - chemical and optical - and from a number of observing platforms, including balloon, rocket, and satellite platforms. The various methods presently used for determining the atmospheric ozone distribution are reviewed, along with a discussion of their advantages and disadvantages. The observed average distribution of total ozone for the period 1958-1975 shows the expected geographic and seasonal variations. The variations of total ozone, including hemispheric differences, are clearly associated with large-scale circulation processes in the lower stratosphere. Approximately ten years of observations of the vertical ozone distribution, up through the ozone maximum, also show geographic and seasonal variations strongly related to the lower stratosphere circulation. The distribution above the maximum, however, results from the interaction of photochemistry and stratospheric motions.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 89
    facet.materialart.
    Unknown
    Gravity research at Cottrell observatory (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The Cottrell gravity research observatory and work in progress are described. Equipment in place and equipment to be installed, the cryogenic gravity meter (CGM), concrete pads to support the vertical seismometer, CGM, and guest experiments, techniques of data analysis, and improvements needed in the CGM are discussed. Harmonic earth eigenvibrations with multipole moments are examined and their compatibility with a fictitious black hole binary system (of which the primary central mass is assigned a value one million solar masses) located 400 light-years away is shown by calculations.
    Keywords: GEOPHYSICS
    Type: IAF PAPER A-77-22
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 90
    facet.materialart.
    Unknown
    Gravitational collapse of a turbulent vortex with application to star formation (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The gravitational collapse of a rotating cloud or vortex is analyzed by expanding the dependent variables in the equations of motion in two-dimensional Taylor series in the space variables. It is shown that the gravitation and rotation terms in the equations are of first order in the space variables, the pressure gradient terms are of second order, and the turbulent viscosity term is of third order. The presence of a turbulent viscosity insures that the initial rotation is solid-body-like near the origin. The effect of pressure on the collapse process is found to depend on the shape of the intial density disturbance at the origin. Dimensionless collapse times, as well as the evolution of density and velocity, are calculated by solving numerically the system of nonlinear ordinary differential equations resulting from the series expansions. The axial inflow plays an important role and allows collapse to occur even when the rotation is large. An approximate solution of the governing partial differential equations is also given, in order to study the spacial distributions of the density and velocity.
    Keywords: ASTROPHYSICS
    Type: Fluid Dynamics Meeting; Nov. 24, 25, 1975; College Park, MD
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 91
    facet.materialart.
    Unknown
    Concepts of magnetospheric convection (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The paper describes the basic theoretical notions of convection applicable to magnetospheres in general and discusses the relative importance of convective and corrotational motions, with particular reference to the comparison of the earth and Jupiter. The basic equations relating the E, B, and J fields and the bulk plasma velocity are given for the three principal regions in magnetosphere dynamics, namely, the central object and its magnetic field, the space surrounding the central object, and the external medium outside the magnetosphere. The notion of driving currents of magnetospheric convection and their closure is explained, while consideration of the added effects of the rotation of the central body completes the basic theoretical picture. Flow topology is examined for the two cases where convection dominates over corotation and vice versa.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 92
    facet.materialart.
    Unknown
    Hot-cold plasma interactions in the earth's magnetosphere (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The paper gives a synopsis of observations and results obtained from the Explorer-45 satellite which pertain directly to the interaction of the magnetospheric hot and cold plasma populations. The specific case discussed is the interaction of the hot ring current plasma with the cold plasmaspheric plasma in the evening to early morning local time sector during magnetic storm recovery phase. It was found that above the plasmapause region, the hot ring current plasma is stable with negligible losses due to pitch angle diffusion; the hot ring current plasma enters a moderate pitch angle regime in the plasmapause region, whereby the addition of cold plasma destabilizes the hot plasma. Analysis of the energy, spatial, and temporal dependence of the above destabilization along with the ion-cyclotron resonant energy equation, and comparison of this analysis with an in situ estimate of the plasma density strongly indicate that the mechanism responsible for destabilization of the hot plasma is the amplification of ion-cyclotron waves due to the interaction of the cold plasmaspheric plasma with the hot ring current plasma in a manner similar to that discussed by Cornwall et al. (1970).
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 93
    facet.materialart.
    Unknown
    The plasma sheet boundary and Kp (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The paper studies data obtained by the suprathermal ion detector aboard the ATS-1 geostationary satellite in order to establish a relation between the local time occurrence of the plasma sheet at the geostationary orbit (6.6 earth radii) and the Kp index. This relation is then used along with Alfven and Falthammer's (1963) equation for the drift path of an electron moving under the combined influence of a homogeneous electric field and a dipole magnetic field to derive an expression that shows the manner in which the inner boundary of the plasma sheet can be expected to vary radially with Kp along the midnight meridian for Kp less than about 4.
    Keywords: GEOPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 94
    facet.materialart.
    Unknown
    The early scientific history of the rocket-grenade experiment (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: In the decade, 1950 to 1960, some thirty sounding rockets carrying the grenade experiment were fired in the Arctic, at middle latitudes and in the equatorial western Pacific. The vertical distributions of temperatures and winds at different seasons and at different times of the day were measured. Although there were significant variations in the results from each of the sites, an outstanding feature was the uniformity with latitude of the seasonal variation of the wind field. Over the latitude-altitude ranges sampled, the winds were strong and from the west during the winter months; and weak and from the east during the summer months. The nature of the general circulation pattern in the mesosphere of the northern hemisphere was revealed by the measurements. Of particular interest were those measurements made at the seasonal turnovers because of the insight into the dynamics of this region they provided.
    Keywords: GEOPHYSICS
    Type: IAF PAPER A75-043 , International Astronautical Federation, International Astronautical Congress; Sept. 21-27, 1975; Lisbon; Portugal
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 95
    facet.materialart.
    Unknown
    Magnetospheric and auroral plasmas: A short survey of progress, 1971 - 1975 (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: Milestones in researches of auroral and magnetospheric plasmas for the past quadrennium 1971 - 1975 are reviewed. Findings, including those of the polar cusp, the polar wind, the explosive disruptions of the magnetotail, the interactions of hot plasmas with the plasmapause, the auroral field-aligned currents, and the striking 'inverted-V' electron precipitation events, are reported. Solutions to major questions concerning the origins and acceleration of these plasmas are discussed. A comprehensive bibliography of current research is included.
    Keywords: GEOPHYSICS
    Type: NASA-CR-142299 , U-OF-IOWA-75-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 96
    facet.materialart.
    Unknown
    Basic research in meteorology and atmospheric physics (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The effect was studied of the variations of the electromagnetic properties of the three phases of water on measurements of atmospheric and oceanographic parameters by microwave instruments aboard satellites. Other studies reported include: orbital detection of extrasolar planets, detection of stratospheric aerosols from earth orbit, chemistry of Jupiter's atmosphere, and stratospheric ozone.
    Keywords: GEOPHYSICS
    Type: NASA-CR-143491
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 97
    facet.materialart.
    Unknown
    Planetary atmosphere parameters and OGO-6 data and plots (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Some OGO-6 observations of the upper atmosphere, planetary atmospheric gases, thermospheric particle concentrations, and ion temperature of planetary ionospheres are examined.
    Keywords: GEOPHYSICS
    Type: NASA-CR-142964
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 98
    facet.materialart.
    Unknown
    Evaluation of atmospheric trace constituent sensors operating from remote space and airborne platforms (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A laboratory gas analysis system was developed specifically to make trace level measurements of carbon monoxide. To assure that the data collected with this system are correctly aligned with other established methods for making these measurements, an intercalibration study was conducted. The calibration gas was analyzed by the various participating laboratories and found to contain 1.28 ppm CO. Samples were collected at 25 deg, 35 deg, and 45 deg N for profile data to study the variation in concentrations of CO and CH4 as a function of altitude and latitude in continental air over the eastern seaboard of the United States. The experiment was repeated several months later to determine if there were seasonally dependent variations in the CO and CH4 concentrations.
    Keywords: GEOPHYSICS
    Type: NASA-CR-162365 , GSTR-79-8
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 99
    facet.materialart.
    Unknown
    Analysis of satellite data on energetic particles of ionospheric origin (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The morphology was studied of precipitating O(+) and H(+) ions in the energy range 0.7 equal to or less than E equal to or less than 12 keV during the storm-time period from December 16-18, 1971, which encompassed two principal magnetic storms. The results are described with emphasis on the temporal variations of parameters characterizing the intensity, average energy, and spatial location of the zones of precipitation of the two ionic species. One of the principal results was the finding that the intensity of the precipitating O(+) ions was well correlated with the geomagnetic indices which measure the strength of magnetospheric substorm activity and the strength of the storm-time ring current. Since the O(+) ions are almost certainly of ionospheric origin the correlations indicate that a previously unknown strong coupling mechanism existed between the magnetosphere and the ionosphere during the storm period.
    Keywords: GEOPHYSICS
    Type: NASA-CR-145863 , QPR-2 , LMSC-D462151
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 100
    facet.materialart.
    Unknown
    Gravity anomaly and geoid undulation results in local areas from GEOS-3 altimeter data (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The adjusted GEOS-3 altimeter data, taken as averages within a data frame, have been used to construct free air anomaly and geoid undulation profiles and maps in areas of geophysical interest. Profiles were constructed across the Philippine Trench (at a latitude of 6 deg) and across the Bonin Trench (at a latitude of 28 deg). In the latter case an anomaly variation of 443 mgals in 143 km was derived from the altimeter data. These variations agreed reasonably with terrestrial estimates, considering the predicted point accuracy was about + or - 27 mgals. An area over the Patton Sea mounts was also investigated with the altimeter anomaly field agreeing well with the terrestrial data except for the point directly over the top of the sea mount. It is concluded that the GEOS-3 altimeter data is valuable not only for determining 5 deg and 1 deg x 1 deg mean anomalies, but also can be used to describe more local anomaly variations.
    Keywords: GEOPHYSICS
    Type: The use of artificial satellites for geodesy and geodynamics. Volume 2; May 29, 1978 - Jun 02, 1978; Athens; Greece
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...