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  • GEOPHYSICS  (9,051)
  • 1980-1984  (3,123)
  • 1970-1974  (5,928)
  • 1
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    Moon rock distribution (1970)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Allocation to scientists of lunar soil samples from Apollo 12
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-70-19
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  • 2
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    Studies on the behavior of ammonia and ammonium salts in the atmosphere (1) - Fractional collection of ammonia gas and particulate ammonium (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Methods for the fractional collection of trace amounts of atmospheric ammonia gas and ammonium particles on a two staged glass fiber filter are summarized. A standard glass fiber filter washed with distilled water and dried at 120 to 130 C was used. A second filter was impregnated with a mixture of 3% boric acid and 25% glycerin solution. The blank of glass fiber filters impregnated with a mixture of the above solution was very low for ammonia, i.e. 0.06 micrograms in a filter of 47 mm in diameter. The mean concentrations of ammonia and ammonium in air at Kawasaki, a polluted area, were 7.6 and 2.3 micrograms cu m, and those at Sanriku, an unpolluted area 0.9 and 0.2 micrograms cu m, respectively. Ratios of concentration levels of ammonium to total ammonia in the atmosphere were 0.3 and 0.2 for the polluted and unpolluted areas, respectively. Ammonium salts in air at both areas were not correlated with relative humidity. Variations in time of ammonia concentrations and sources in surrounding areas are also considered.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76582
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  • 3
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    Method of determination of the mass composition of ring current ions (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A method for individual registration of protons, and helium and oxygen ions, with energies E for a charge on the order of 100 kev/q in the ring currents of the Earth's magnetosphere was examined. The method is based on the various specific losses in energy by these ions in matter. The ion current, selected according to E/q, is passed through a solid target, after which identification of the masses is carried out, based on the energy losses in the possibly to reliably divide the flows of protons, and helium and oxygen ions.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76246
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  • 4
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    Meridional heat transport at the onset of winter stratospheric warming (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A continuous vertical flow of energy toward high altitude was verified. This process produced a dynamic instability of the stratospheric polar vortex. A meridional heat transport ws primed toward the north, which generated a warming trend.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76614
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  • 5
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    Mathematical developments regarding the general theory of the Earth magnetism (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A literature survey on the Earth's magnetic field, citing the works of Gauss, Erman-Petersen, Quintus Icilius and Neumayer is presented. The general formulas for the representation of the potential and components of the Earth's magnetic force are presented. An analytical representation of magnetic condition of the Earth based on observations is also made.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77103 , NAS 1.15:77103
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  • 6
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    Physics of the atmosphere: Response of the water vapor channel of the Meteosat satellite (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An accurate model of the atmospheric transmission function is used to obtain the relationship between the cloudless radiances measured by the 6-7 microns Meteosat radiometer (water vapor channel) and the numerical parameters associated to each point of an image. This relationship is compared to the temporary calibration curve published by the European Space Agency.
    Keywords: GEOPHYSICS
    Type: NASA-TM-75836
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  • 7
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    The NASA Geodynamics Program report, 1981 (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The activities of the NASA Geodynamics Program in 1981 both in achieving improved measurement precision and in establishing the foundation for the acquisition and analysis of scientific data are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-85126 , EL-4 , NAS 1.15:85126
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  • 8
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    The Magsat mission (1982)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The cesium-vapor scalar and fluxgate vector magnetometers aboard the Magsat spacecraft, which has a twilight, sun-synchronous orbit with a 96.76-deg inclination, have together measured the earth's magnetic field magnitude to accuracies better than 2 nT, and the magnitude of each field component to better than 6 nT. The magnetometers are located at the end of a boom to isolate them from the effects of spacecraft fields, and an optical system was used to measure the attitude of the vector magnetometer and sun sensor at the boom relative to the two star cameras of the main spacecraft structure. The data gathered is available from the National Space Science Data Center in several formats and is currently undergoing analysis. Scalar and vector error budget values are given for the spacecraft's five error sources, which include the instrument, position and time errors, digitization noise, attitude errors, and spacecraft fields.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 9; Apr. 198
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  • 9
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    Mini-review on topside sounding (1980)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The paper outlines the techniques used to obtain topside ionograms and reduce them to electron profiles, indicating the most important differences between ground-based and satellite-based ionograms. The theory of the total reflection sounding technique at vertical incidence is outlined and the features of the satellite instrumentation are discussed. Finally, topside sounder data are analyzed with reference to the problems encountered in the conversion of the sounder data to N(h) profiles.
    Keywords: GEOPHYSICS
    Type: IEEE Transactions on Antennas and Propagation; AP-28; Mar. 198
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  • 10
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    Earth Resources: A continuing bibliography with indexes, issue 1 (1974)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This bibliography lists 616 reports, articles, and other documents introduced into the NASA scientific and technical information system between January 1974 and March 1974. Emphasis is placed on the use of remote sensing and geophysical instrumentation in spacecraft and aircraft to survey and inventory, natural resources and urban areas. Subject matter is grouped according to agriculture and forestry, environmental changes and cultural resources, geodesy and cartography, geology and mineral resources, oceanography and marine resources, hydrology and water management, data processing and distribution systems, instrumentation and sensors, and economic analysis.
    Keywords: GEOPHYSICS
    Type: NASA-SP-7041(01)
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  • 11
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    International Workshop on Earth Resources Survey Systems, Volume 2 (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Proceedings of conference on earth resources survey systems - Vol. 2
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-68912 , May 03, 1971 - May 14, 1971; Ann Arbor, MI; United States
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  • 12
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    International Workshop on Earth Resources Survey Systems, volume 1 (1972)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Proceedings of conference on earth resources survey systems to show applications of remote sensing to agriculture, forestry, oceanography, and urban development - Vol. 1
    Keywords: GEOPHYSICS
    Type: NASA-SP-283-VOL-1 , LC-72-180875 , International Workshop on Earth Resources Survey Systems; May 03, 1971 - May 14, 1971; Ann Arbor, MI; United States
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  • 13
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    Physics of the space environment (1972)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Upper atmospheric physics and chemistry, auroras, and solar flare forecasting - colloquium
    Keywords: GEOPHYSICS
    Type: NASA-SP-305 , Jan 01, 1970 - Dec 31, 1971; Huntsville, AL; United States
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  • 14
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    Remote sensing of the Chesapeake Bay (1972)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Proceedings of conference on remote sensing of resources contained in Chesapeake Bay to determine effects of environmental pollution
    Keywords: GEOPHYSICS
    Type: NASA-SP-294 , LC-74-190299 , Apr 05, 1971 - Apr 07, 1971; Wallops Station, VA; United States
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  • 15
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    NASA to Survey Earth's Resources (1971)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: A wide variety of the natural resources of earth and man's management of them will be studied by an initial group of foreign and domestic scientists tentatively chosen by the National Aeronautics and Space Administration to analyze data to be gathered by two earth-orbiting spacecraft. The spacecraft are the first Earth Resources Technology Satellite (ERTS-A) and the manned Skylab which will carry an Earth Resources Experiment Package (EREP). In the United States, the initial experiments will study the feasibility of remote sensing from a satellite in gathering information on ecological problems. The objective of both ERTS and EREP aboard Skylab is to obtain multispectral images of the surface of the earth with high resolution remote sensors and to process and distribute the images to scientific users in a wide variety of disciplines. The ERTS-A, EREP, and Skylab systems are described and their operation is discussed.
    Keywords: GEOPHYSICS
    Type: NASA-NEWS-RELEASE-71-202
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  • 16
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    Atmospheric and ionospheric effects of precipitated energetic O(+) ions (1983)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: Results of earlier studies on the atmospheric and ionospheric effects of the precipitation of energetic (up to 0.4 ergs/sq cm per sec per sr) O(+) fluxes are summarized. It is concluded that the main effect is the transfer of the bulk of the incoming energy flux to the neutral atmosphere at F region altitudes in the form of heat, which in turn has a significant effect on global thermospheric winds and temperatures. The precipitation events produce a large backsplash of energetic neutral oxygen atoms. The flux of O2 capable of escaping from the earth is estimated to be comparable to that of hydrogen, and the portion of these O2 atoms that could be ionized is estimated to be ten times that of the incoming O(+) ions, raising the possibility that the events may be self-sustaining.
    Keywords: GEOPHYSICS
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  • 17
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    Present state of knowledge of the upper atmosphere: An assessment report (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A program of research, technology, and monitoring of the phenomena of the upper atmosphere, to provide for an understanding of and to maintain the chemical and physical integrity of the Earth's upper atmosphere was developed. NASA implemented a long-range upper atmospheric science program aimed at developing an organized, solid body of knowledge of upper atmospheric processes while providing, in the near term, assessments of potential effects of human activities on the atmosphere. The effects of chlorofluorocarbon (CFC) releases on stratospheric ozone were reported. Issues relating the current understanding of ozone predictions and trends and highlights recent and future anticipated developments that will improve our understanding of the system are summarized.
    Keywords: GEOPHYSICS
    Type: NASA-TM-87559 , NAS 1.15:87559
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  • 18
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    Intercomparison of stratospheric/mesospheric data; Proceedings of the Topical Meeting, Graz, Austria, June 25-July 7, 1984 (1984)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: Comparative analyses of various stratospheric and mesospheric species, including aerosols, ions, ozone, and some minor species, are presented, based on measurements obtained from rocket, balloon, aircraft, and satellite missions. In addition, studies concerning temperature and density characteristics of the stratosphere and mesosphere are included, as well as discussions on the various sensing and measurement techniques. Finally, dynamics and turbulence measurements are examined; consideration is given to radar winds, solar X-ray and HF radiowave absorption, and ionization irregularities.
    Keywords: GEOPHYSICS
    Type: (ISSN 0273-1177)
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  • 19
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    DE-1 observations of ordinary mode and extraordinary mode auroral kilometric radiation (1984)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: Observations of auroral kilometric radiation (AKR) made with the Dynamics Explorer (DE-1) indicate the presence of both ordinary and extraordinary wave modes. Although the two modes usually occur separately, they are sometimes observed together. When both modes are present, the ordinary-mode component tends to occur at lower frequencies and with lower amplitudes than those of the accompanying extraordinary-mode component. On the other hand, the local electron gyrofrequency is an absolute lower frequency cutoff for both modes. Ordinary mode intensities are proportional to extraordinary mode intensities but less by roughly a factor of 50. Extraordinary mode ray paths are generally confined to a cone within 50 degrees of the source magnetic field direction and ordinary mode emissions are typically observed outside of this cone. This behavior suggests that both components are produced within the same source region but are then refracted differently as they escape.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 11; 1188-119
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  • 20
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    Aerosol limb absorption (1984)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: A global observation was conducted of the vertical distribution of stratospheric aerosol and ozone using the absorption effect of the rays of the Sun by the stratospheric aerosol and ozone.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77733 , NAS 1.15:77733
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  • 21
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    Fast collisionless tearing in an anisotropic neutral sheet (1984)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The collisionless tearing mode in a neutral sheet is studied in the presence of ion temperature (Ti) anisotropy, using Vlasov description for both ions and electrons. It is found that the growth rate of the instability is significantly enhanced if the ratio of Ti perpendicular to the equilibrium magnetic field to Ti parallel to the field is greater than one. For typical magnetotail parameters with modest temperature anisotropy, it is shown that the linear e-folding time is reduced to a small fraction of the time delays believed to precede the onset of reconnection. This enhancement of the growth rate is due to the Lorentz force acting on the ions that cross the neutral plane, traversing beyond the conventional electron-tearing layer.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 11; 12-15
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  • 22
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    Discussion of the design of satellite-laser measurement stations in the eastern Mediterranean under the geological aspect. Contribution to the earthquake prediction research by the Wegener Group and to NASA's Crustal Dynamics Project (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Research conducted for determining the location of stations for measuring crustal dynamics and predicting earthquakes is discussed. Procedural aspects, the extraregional kinematic tendencies, and regional tectonic deformation mechanisms are described.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77412 , NAS 1.15:77412
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  • 23
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    The elements of the Earth's magnetism and their secular changes between 1550 and 1915 (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The results of an investigation about the magnetic agents outside the Earth's surface as well as the Earth's magnetic elements for the epochs 1550, 1900, 1915 are presented. The secular changes of the Earth's magnetic elements during the time interval 1550 - 1900 are also included.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77343 , NAS 1.15:77343
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  • 24
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    Testing the authenticity of moldavite by electron microscopy (1983)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Non-destructive testing of moldavites for authenticity by electron microscopy on the basis of morphology and structure is described.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77335 , NAS 1.15:77335
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  • 25
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    On the determination of the coefficients of the Gaussian general theory of the Earth's magnetism for the year 1885 and about the relationship of the three Earth-magnetic elements (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An attempt is made to judge the value of the Gaussian series for the Earth's magnetism. The computation employed to do this uses the method of the least and greatest coefficients. The number of unknown which had to be calculated from the individual groups was at most only four. All symbols of Gauss were retained.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77105 , NAS 1.15:77105
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  • 26
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    Report on new calculations of the magnetic potential of the Earth (1983)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: A procedure to establish better agreement between theoretical and calculated values of the magnetic potential of the Earth is discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77329 , NAS 1.15:77329
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  • 27
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    The NASA Geodynamics Program: An overview (1983)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: This NASA Geodynamics Program overview collectively examines the history, scientific basis, status, and results of the NASA Program and outlines plans for the next five to eight years. It is intended as an informative nontechnical discussion of geodynamics research.
    Keywords: GEOPHYSICS
    Type: NASA-TP-2147 , NAS 1.60:2147
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  • 28
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    Coordinated airborne and satellite measurements of equatorial plasma depletions (1982)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: A series of experiments conducted in December 1979 to investigate the structure of plasma depletions in the low latitude, nighttime ionosphere is discussed. Density biteouts of about one order of magnitude in the dominant ion, O(+), are mapped to lower altitudes along magnetic field lines for comparison with 6300-A and 7774-A O I airglow depletions. Owing to the different airglow production mechanisms (dissociative recombination of O2(+) for 6300 A and radiative recombination of O(+) for 7774 A), the 6300-A depletions reflect plasma depletions near the bottomside of the F layer, while those at 7774 A are located near the peak of the layer. The O(+) biteouts map directly into the 7774-A airglow depletions in the same hemisphere and also when traced into the opposite hemisphere, which suggests magnetic flux tube alignment over north-south distances of approximately 2220 km. The 6300-A (bottomside) depletions are found to be wider in longitude than the 7774-A (F-peak) depeletions near the equatorward edge of the Appleton anomaly.
    Keywords: GEOPHYSICS
    Type: AD-A123689 , AFGL-TR-83-0004 , Journal of Geophysical Research; 87; Dec. 1
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  • 29
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    Atmospheric cycles of nitrogen oxides and ammonia (1981)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: The atmospheric cycles of nitrogenous trace compounds for the Northern and Southern Hemispheres are discussed. Source strengths and destruction rates for the nitrogen oxides: NO, NO2 and HNO3 -(NOX) and ammonia (NH3) are given as a function of latitude over continents and oceans. The global amounts of NOX-N and NH3-N produced annually in the period 1950 to 1975 (34 + 5 x one trillion g NOx-N/yr and 29 + or - 6 x one trillion g NH3-N/yr) are much less than previously assumed. Globally, natural and anthropogenic emissions are of similar magnitude. The NOx emission from anthropogenic sources is 1.5 times that from natural processes in the Northern Hemisphere, whereas in the Southern Hemisphere, it is a factor of 3 or 4 less. More than 80% of atmospheric ammonia seems to be derived from excrements of domestic animals, mostly by bulk deposition: 24 + or - 9 x one trillion g NO3 -N/yr and 21 + or - 9 x one trillion g NH4+-N/yr. Another fraction may be removed by absorption on vegetation and soils.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76652 , NAS 1.15:76652
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  • 30
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    Photometric and radar observations of an excited eruption in the Zarnitsa-2 experiment (1980)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: In a controlled experiment a ground photometer and radar station recorded an increase in night sky luminescence following injection of an electron beam into the atmosphere from a rocket at altitudes 80 to 154 km. A main and supplementary scattering and luminescene regions were observed. The effect is presumed to be due to electron eruption induced by artificial action on the magnetosphere.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76216 , PR-388
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  • 31
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    Determination of the cumulus size distribution from LANDSAT pictures (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Varying insolation causes undesirable thermic stress to the receiver of a solar power plant. The rapid change of insolation depends on the size distribution of the clouds; in order to measure these changes, it is suitable to determine typical cumulus size distributions. For this purpose, LANDSAT-images are adequate. Several examples of cumulus size distributions will be presented and their effects on the operation of a solar power plant are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77070 , NAS 1.15:77070
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  • 32
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    Early harvest: The upper atmosphere and cosmic rays (1980)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: Achievements in space science through 1958 are summarized. Topics discussed are: the scheduling of V-2 flights; the development of newer rockets; the testing of spaceborne instruments; the seeking of financial support for space research; and the problems of international cooperation. Special emphasis is placed on atmospheric sounding.
    Keywords: GEOPHYSICS
    Type: Beyond the Atmosphere: Early Years of Space Sci.; p 58-84
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  • 33
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    NASA geodynamics program (1980)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: The history and development of the geodynamics program are described, in addition to accomplishments and plans for the future years activities. Extramural grant titles are listed for general research, Lageos investigations, and Magsat investigations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-81978
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  • 34
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    Earth albedo and emitted radiation (1971)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Global annual averages f earth albedo and radiation used to estimate long term effects on space vehicle equipment and surfaces
    Keywords: GEOPHYSICS
    Type: NASA-SP-8067
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  • 35
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    Model forecasts and world observations of the ozone layer, 1960 - 1980 (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Theoretical and actual measurements of the decrease in global ozone are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76444
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  • 36
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    Anomalous magnetizations in 3.4 b.y. old Barberton Mountain Land samples (1981)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: The ratio of natural remanence (NRM) to saturation remanence is exceedingly high for a number of basaltic to ultramafic samples from the 3.4 billion year old Barberton Mountain Land greenstone belt, South Africa. Although conventional paleointensity methods indicate paleofields of several oersteds, demagnetization curves plotted on logarithmic scale clearly show the NRM in these samples to be unlike thermal remanence. It is probable that the observed NRM is a chemical remanence related to the greenschist metamorphic event, and that the intense magnetizations are the result of internally generated, rather than external fields.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 8; Feb. 198
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  • 37
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    Ecological surveys from space (1970)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Spaceborne photography using different combinations of film and filters for earth resources surveys
    Keywords: GEOPHYSICS
    Type: NASA-SP-230
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    Physics of the ionosphere and of the magnetosphere (1970)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: Ionospheric and magnetospheric physics
    Keywords: GEOPHYSICS
    Type: REPT. TO COSPAR, FRENCH SPACE PROGRAM FEB. 1970; P 1-22
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  • 39
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    The planets and life (1971)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: Investigating Surtsey and Iceland as natural laboratories for testing planetary life detection techniques
    Keywords: GEOPHYSICS
    Type: BOSTON COLL. ENVIRON. CENTER SUMMER INST. ON SURTSEY AND ICELAND FEB. 1971; P 32-34
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  • 40
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    Study of the system of middle atmosphere-ionosphere using remote-sensing data (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: In the present investigation, the methods of statistical spectral analysis are employed for a study of the quasi-periodic changes of state parameters of the middle atmosphere and the ionosphere, taking into account oscillations with periods of several days. The considered oscillations are typical for planetary waves. The theory and empirical findings regarding transient planetary waves are utilized as a basis for the concepts employed in the data analysis and for the interpretation of the results. The results of the investigation show a presence of coherent variations in the time series of radiation density measurements and other state parameters for the middle atmosphere and the ionosphere. The existence of presumably dynamic coupling processes can be recognized in oscillations with periods of about 16 or 5 days.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77764 , NAS 1.15:77764
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  • 41
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    The magnetic state of the Earth (according to the magnetic maps for 1880.0 published by the German Naval Office) (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Publication of the magnetic maps in 1880 has made it possible to make the first continuation of the foundations for the Earth's magnetism established by Gauss in the general theory of Earth magnetism. A new calculation based on the maps valid for 1880, makes it possible to express the changes which have occurred over the last 50 years in numbers and only within the liability limits of the maps themselves.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77058 , NAS 1.15:77058
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  • 42
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    The elements of the Earth's magnetism for the Epochs 1600, 1650, 1700, 1780, 1842 and 1885, and their secular changes derived from observations calculated using the coefficients of the Gaussian "General Theory of Earth's Magnetism" (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: After a historical review of the theory of the Earth's magnetism, the author indicates how the theory may be improved and gives results of his own calculations for the Epoch 1842.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77100 , NAS 1.15:77100
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    Nonuniformity of the Earth's rotation and the motion of the poles (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The study of the nonuniformity of the Earth's rotation and the motion of the poles has great practical and theoretical significance. This study makes it possible to determine the coordinates of celestial and terrestrial objects, and to gain information in many domains of earth science. This paper reviews studies of rotation nonuniformity and polar motion, giving attention to astronomical data; the nature of periodic oscillations of the Earth's rotation; the nature of long-period variations of the Earth's rotation rate; and the use of Earth-rotation data in hydrometeorology.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77337 , NAS 1.15:77337
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    On the analytical form of the Earth's magnetic attraction expressed as a function of time (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: An attempt is made to express the Earth's magnetic attraction in simple analytical form using observations during the 16th to 19th centuries. Observations of the magnetic inclination in the 16th and 17th centuries are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77344 , NAS 1.15:77344
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  • 45
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    Ionospheric plasma bubble encounters or F region bottomside traversals? (1983)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: Data from in situ Atmospheric Explorer (AE) measurements and ground-based ionosonde measurements of the ion composition and concentration in the equatorial plasma bubbles are analyzed. The ionosonde produced data on the bottomside electron density (NE) profiles and aided in ascertaining the satellite measurements as being in the topside or bottomside of the F layer. The AE data were taken during low latitude evening conditions at various altitudes, and revealed ion compositions consistent with plasma bubbles originating at the altitude of the steep F region bottomside ionization gradient. The lifetimes of NO ions were observed to be short even if the ions were dominant in the regions where the bubbles form. Vertical distortions of tens of kilometers in the equatorial F region occurred in the unstable postsunset period to the extent that the bubble formation area and the bottomside plasma region became virtually indistinguishable.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 88; Aug. 1
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  • 46
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    The application of space technology to geodynamics - An overview (1981)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: The application of various space technologies to the study of the earth is discussed. The main problems that this technology can study are crustal movement and deformation, and earth structure and rotational dynamics. Laser and VLBI systems are used as fixed observatories and as mobile stations which can move between locations separated by 200 to 500 km. Requirements for more frequency and more densely spaced measurements can be met by the use of geodetic receivers which process signals from the Global Positioning System, and an airborne laser which ranges simultaneously to an array of passive cube corner retroreflectors. A Gravity Field Satellite is expected to survey the earth's field to a resolution of 1000 km and accuracies of one milligal. Data from the Magnetic Field Satellite are being used to develop models of the main field for the 1980 Epoch and maps of crustal anomalies.
    Keywords: GEOPHYSICS
    Type: International Geoscience and Remote Sensing Symposium; Jun 08, 1981 - Jun 10, 1981; Washington, DC
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  • 47
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    Geodynamic program office (1983)
    In:  CASI
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    Publication Date: 2019-08-27
    Description: Program activities and achievements in 1982 of the geodynamic program are summarized. The significant results presented are summarized.
    Keywords: GEOPHYSICS
    Type: NASA-TM-85842 , EE-8 , NAS 1.15:85842
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  • 48
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    Report of Workshop on Mount Saint Helens: Its Atmospheric Effects and Potential Climatic Impact (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The atmospheric and potential climatic aspects of a volcanic eruption were discussed. Measurements and techniques used in collecting the data are summarized.
    Keywords: GEOPHYSICS
    Type: NASA-SP-458 , NAS 1.26:458 , LC-82-8005
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    Statistical analysis of persistent explosive activity at Stromboli, 1971 - Implications for eruption prediction (1980)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Keywords: GEOPHYSICS
    Type: Journal of Volcanology and Geothermal Research; 8; 1980
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  • 50
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    Subcritical Fracture Propagation in Rocks: an Examination Using the Methods of Fracture Mechanics and Non-Destructive Testing (1984)
    In:  Other Sources
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    Publication Date: 2019-08-14
    Description: An experimental investigation of tensile rock fracture is presented with an emphasis on characterizing time dependent crack growth using the methods of fracture mechanics. Subcritical fracture experiments were performed in moist air on glass and five different rock types at crack velocities using the double torsion technique. The experimental results suggest that subcritical fracture resistance in polycrystals is dominated by microstructural effects. Evidence for gross violations of the assumptions of linear elastic fracture mechanics and double torsion theory was found in the tests on rocks. In an effort to obtain a better understanding of the physical breakdown processes associated with rock fracture, a series of nondestructive evaluation tests were performed during subcritical fracture experiments on glass and granite. Comparison of the observed process zone shape with that expected on the basis of a critical normal principal tensile stress criterion shows that the zone is much more elongated in the crack propagation direction than predicted by the continuum based microcracking model alone.
    Keywords: GEOPHYSICS
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    Remote Sensing of Ocean Current Boundary Layer (1974)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10728 , NASA-CR-139574 , MPR-13
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    The Development of a Stochastic Model of the Atmosphere Between 30 and 90 Km to Be Used in Determining the Effect of Atmospheric Variability on Space Shuttle Entry Parameters (1973)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A stochasitc model of the atmosphere between 30 and 90 km was developed for use in Monte Carlo space shuttle entry studies. The model is actually a family of models, one for each latitude-season category as defined in the 1966 U.S. Standard Atmosphere Supplements. Each latitude-season model generates a pseudo-random temperature profile whose mean is the appropriate temperature profile from the Standard Atmosphere Supplements. The standard deviation of temperature at each altitude for a given latitude-season model was estimated from sounding-rocket data. Departures from the mean temperature at each altitude were produced by assuming a linear regression of temperature on the solar heating rate of ozone. A profile of random ozone concentrations was first generated using an auxiliary stochastic ozone model, also developed as part of this study, and then solar heating rates were computed for the random ozone concentrations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-69567
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    Use of ERTS Data for Mapping Snow Cover in the Western United States (1973)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: The author has identified the following significant results. Results of the analysis of the initial sample of ERTS-1 data indicate that the MSS-5 spectral band is the most useful for detecting and mapping mountain snow cover. At the ERTS-1 resolution, snow cover can be readily detected in the MSS-5 band and can be distinguished from clouds. Snow line elevations have been mapped for five mountain areas. In one case for the Salt-Verde watershed in Arizona good agreement is observed between the location of the snow line as mapped from the ERTS-1 data and as depicted on an aerial snow survey chart compiled a week earlier. Examination of data from the Arctic has revealed that multispectral data can provide information on glacial conditions that cannot be ascertained from observations in a single spectral band.
    Keywords: GEOPHYSICS
    Type: E73-10087 , NASA-CR-130336 , P-407-3
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    Fourth Annual Earth Resources Program Review. Volume 2: University Programs (1972)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: University research in data processing techniques to extract information on earth resources from remotely sensed areas - conference
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-68397 , MSC-05937-VOL-2 , 44th Annual Earth Resources Review; Jan 17, 1972 - Jan 21, 1972; Houston, TX; United States
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    Simulating and Interpreting Aerial or Orbital TV Observations of Geographic Patterns (1972)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Simulation and interpretation of aerial or orbital TV and photographic observations of earth geographic patterns
    Keywords: GEOPHYSICS
    Type: NASA-CR-126254 , USGS-DO-72-004 , USGS-IR-NASA-223 , TR-5
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  • 56
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    Remote sensing and water resources - U.S. Space Program (1973)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: Since the launch of TIROS I in 1960, the utility of remote sensing from orbit for monitoring the earth's weather has been conclusively demonstrated. The past decade has also seen progress in applying remote sensing to the observation of terrestrial features. Variations in snow and ice cover, surface water, river and lake turbidity, and other hydrological features are now being accurately observed from orbital altitudes by the Earth Resources Technology Satellite (ERTS-1), NOAA-2, and Nimbus 5. Satellite visible, infrared and microwave measurements will be continued over the next few years, with improved spatial and spectral accuracy, by Skylab, ERTS-B, and Nimbus F. Delineations of soil and snow moisture variations, thermal patterns in lakes and estuaries, and regions of heavy precipitation are among the results anticipated.
    Keywords: GEOPHYSICS
    Type: Symposium on Remote sensing and water resources management; Jun 11, 1973 - Jun 14, 1973; Ontario; Canada
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    Results of the 1971 Corn Blight Watch experiment. (1973)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: The objective of the experiment was to evaluate the use of advanced remote sensing techniques to detect the development and spread of southern corn leaf blight during the growing season across the Corn Belt region. The sampling plan involved the selection of the study area, the determination of the flightline, and the determination of a field sample design. Aspects of data acquisition are discussed, giving attention to ground data collection and aerial data collection. Details of data flow are considered along with data analysis procedures and corn blight records. The experiment results are examined, taking into account photointerpretation results, the machine analysis of multispectral scanner data results, the influence of blight on yields, and questions of crop identification.
    Keywords: GEOPHYSICS
    Type: International Symposium on Remote Sensing of Environment; Oct 02, 1972 - Oct 06, 1972; Ann Arbor, MI
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    The United States earth resources survey program and ERTS experiments benefit highlights (1974)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: With the launch of the first Earth Resources Technology Satellite in July 1972 a major new tool has become available for decision making in the assessment, exploitation, and management of the earth's resources on a national and international basis. The current status of the earth resources survey program is discussed and the future potential is reviewed. The supportive roles of all stages of the system, including surface, aircraft, and satellite components are noted. Specific cases of application of ERTS data are presented together with a discussion of benefits that might accrue. Need for cooperative, coordinated efforts between participants is emphasized.
    Keywords: GEOPHYSICS
    Type: AIAA PAPER 74-249 , Annual Meeting and Technical Display; Jan 28, 1974 - Jan 30, 1974; Washington, DC
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    ERTS-1 - Toward global monitoring. (1973)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: The satellite has a near-polar orbit with a mean altitude of about 547 n. mi. On the average six million square kilometers are mapped daily. The multispectral scanner and other essential systems on board the satellite have suffered no detectable degradation since the early failures of a circuit switch and one of the two tape recorders. A year of ERTS-1 experience has shown that many applications can be mechanized with the present instrumentation. New investigations planned for future satellites are discussed, giving attention to pollution monitoring, geological studies, heat-balance surveys, and the analysis of damage caused by storms and earthquakes.
    Keywords: GEOPHYSICS
    Type: Astronautics and Aeronautics; 11; Sept
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    Magnetospheric structure. (1972)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: Magnetospheric research over the period from 1969 to 1971 is surveyed by describing significant results obtained from studies of the bow shock, magnetosheath, magnetopause, polar cusp, convection-driving electric fields, and the composition of trapped particles with charge greater than one. Particle and field observations are related to general questions of particle origin and destination as well as the mechanism by which the entire system remains in equilibrium.
    Keywords: GEOPHYSICS
    Type: Symposium on Earth''s magnetospheric processes; Aug 30, 1971 - Sep 10, 1971; Cortina; Italy
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    Correlated low-frequency electric and magnetic noise along the auroral field lines (1984)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: Dynamics Explorer 1 measurements of intense low-frequency electric and magnetic noise observed at low altitudes over the auroral zone are described. The intensity of both the electric and magnetic fields decreases rapidly with increasing frequency. Most of the energy is at frequencies below the O(+) cyclotron frequency, and some evidence is found for a cutoff or change in spectral slope near that frequency. The magnetic to electric field ratio decreases rapidly with increasing radial distance and also decreases with increasing frequency. The polarization of the electric field in a plane perpendicular to the earth's magnetic field is essentially random. The transverse electric and magnetic fields are closely correlated, with the average Poynting flux directed toward the earth. The total electromagnetic power flow associated with the noise is substantial. Two general models are discussed to interpret these observations, one based on static electric and magnetic fields imbedded in the ionosphere and the other based on Alfven waves propagating along the auroral field lines.
    Keywords: GEOPHYSICS
    Type: AD-A150627 , Journal of Geophysical Research (ISSN 0148-0227); 89; 8971-898
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    Effects of chemical releases by the STS-3 Orbiter on the ionosphere (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The Plasma Diagnostics Package, flown aboard STS-3 as part of the first Shuttle payload (OSS-1), recorded the effects of various chemical releases from the Orbiter. Changes in the plasma environment was observed during flash evaporator system releases, water dumps and maneuvering thruster operations. During flash evaporator operations, broadband Orbiter-generated electrostatic noise was enhanced and plasma density irregularities were observed to increase by 3 to 30 times with a spectrum which rose steeply and peaked below 6 Hz. In the case of water dumps, background electrostatic noise was enhanced at frequencies below about 3 kHz and suppressed at frequencies above 2 kHz. Thruster activity also stimulated electrostatic noise with a spectrum which peaked at approximately 0.5 kHz. In addition, ions with energies up to 1 keV were seen during some thruster events.
    Keywords: GEOPHYSICS
    Type: NASA-CR-171032 , NAS 1.26:171032 , U-OF-IOWA-84-5
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  • 63
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    The magnetic state of the Earth at epoch 1885.0 (1983)
    In:  CASI
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    Publication Date: 2019-08-13
    Description: The fundamentals and results of a geomagnetic investigation are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77342 , NAS 1.15:77342
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    NASA geodynamics program (1982)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: The goals of the NASA geodynamics program comprise the study of the interior structure and composition of the earth, its crustal motions and deformations, the rotational dynamics, and the terrestrial potential fields. Laser ranging an VLBI techniques are being applied in cooperation with 16 other countries. Reflectors on the moon are illumined with laser beams from earth, which are also bounced off the Lageos and French Starlette satellites, permitting monitoring of polar motion, earth rotation, and distance to the moon within 5 cm. Mobile laser systems are being deployed for developing a gravity field model and examining crustal deformation regionally. The VLBI installations use quasars as reference objects and the GPS satellites will give position accuracy within 1-2 cm. Satellite-to-satellite tracking, Magsat, and Shuttle timing experiment data are providing geopotential field data and timing synchronization.
    Keywords: GEOPHYSICS
    Type: In: 1982 International Geoscience and Remote Sensing Symposium; Jun 01, 1982 - Jun 04, 1982; Munich
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    Mapping the earth's magnetic and gravity fields from space Current status and future prospects (1983)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: The principal magnetic fields encountered by earth orbiting spacecraft include the main (core) field, external fields produced by electrical currents within the ionosphere and magnetosphere, and the crustal (anomaly) field generated by variations in the magnetization of the outermost portions of the earth. The first orbital field measurements which proved to be of use for global studies of crustal magnetization were obtained by a series of three satellites launched and operated from 1965 to 1971. Each of the satellites, known as a Polar Orbiting Geophysical Observatory (POGO), carried a rubidium vapor magnetometer. Attention is also given to Magsat launched in 1979, the scalar anomaly field derived from the Magsat measurements, satellite tracking studies in connection with gravity field surveys, radar altimetry, the belt of positive free air gravity anomalies situated along the edge of the Pacific Ocean basin, future technological capabilities, and information concerning data availability.
    Keywords: GEOPHYSICS
    Type: (ISSN 0273-1177)
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  • 66
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    NASA earth resources satellite research and development program. (1971)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: The NASA Earth Resources Survey (ERS) Program is discussed as an effort to augment the presently used ground techniques and limited aerial photography for obtaining larger survey data. The topics include the scientific and technological aspects of remote earth resources sensing, the past and present activities in this field, the immediate plans for the implementation of the program, and a summary of current and future international participation in it. The effective target areas of space observations under the program are listed as synoptic surveys, agriculture and forestry, geography, geology and mineral resources, hydrology and water resources, and marine resources. Acquisition of near real-time information, reduced data acquisition time, repeated coverage, measurement uniformity, global surveys without large on-site support requirements are indicated as the advantages of space observations.
    Keywords: GEOPHYSICS
    Type: In: Astronautical research 1970; Oct 04, 1970; Konstanz
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    This Island Earth (1970)
    In:  CASI
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    Publication Date: 2019-08-13
    Description: Spaceborne photographs of earth atmosphere, lands, and waters, with photographs of sun, moon, and planets
    Keywords: GEOPHYSICS
    Type: NASA-SP-250
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    On plasma instabilities in the high-latitude ionospheric E region (1981)
    In:  Other Sources
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    Publication Date: 2019-07-27
    Description: The use of the Farley-Buneman instability in the high-latitude E region of the earth's ionosphere as a diagnostic tool for ionospheric and solar wind electric fields, and the effect of Farley-Buneman waves on cosmic radio noise events observed on riometers, are discussed. Data are analyzed and presented in support of the hypothesis, suggested by Olesen (1972), that the Slant E condition in polar cap ionograms is a manifestation of the Farley-Buneman instability in the E region. Detailed descriptions are given of the experimental apparatus employed in these investigations.
    Keywords: GEOPHYSICS
    Type: In: Relation between laboratory and space plasmas; April 14, 15, 1980; Tokyo; Japan
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    Proposed stratigraphic controls on the composition of crude oils reservoired in the Green River formation, Uinta Basin, Utah. (1972)
    In:  Other Sources
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    Publication Date: 2019-07-27
    Keywords: GEOPHYSICS
    Type: International Meeting on Advances in organic geochemistry 1971; Sept. 7-10, 1971; Hanover; Germany
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    Earth Resources Technology Satellite-1 Symposium Proceedings, 29 September 1972 (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: Papers presented to the symposium on ERTS-1 are reported. The performance of sensors and systems, and applications of ERTS-1 imagery are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-66193 , X-650-73-10 , Md.; Greenbelt
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    Determination of atmospheric backscatter at 10.6 microns (1983)
    In:  Other Sources
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    Publication Date: 2019-07-27
    Description: Profiles have been obtained for atmospheric aerosol backscatter coefficient versus altitude at four different geographical locations, by means of a 10.6-micron lidar that uses a CO2 laser. A Mach-Zehnder interferometer is used to separate the laser output beam into a measurement beam and a reference beam. The interferometer combines the reference beam with backscattered radiation collected by a telescope, and the combined beams are focused onto a cooled HgCdTe photodiode at the interferometer exit. Attention is given to the results of a backscatter study experiment flown aboard a NASA research aircraft.
    Keywords: GEOPHYSICS
    Type: Coherent infrared radar systems and applications II; April 7, 8, 1983; Arlington, VA
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  • 72
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    EXOS-B/Siple Station VLF wave-particle interaction experiment (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Preliminary results of experiments made using the EXOS-B satellite to make simultaneous observations of VLF signals transmitted from Siple Station, Antarctica and interacting particles are reported. VLF measurements carried out by the EXOS-B wideband receiver upon satellite crossings of the Siple meridian at equatorial and high latitudes were able to detect the Siple signal on about 50% of the passes, and observed four instances of artificially stimulated emissions. Two of these cases exhibit triggering with a clear relation to the transmitted frequency format, while in the remaining two this relation is absent. Electron fluxes at energies from 3 eV to 9.5 keV are observed to be enhanced during the Siple stimulated emission events, with a distribution on the equatorial passes sufficient to satisfy the cyclotron interaction condition for parallel propagation of Siple signals of frequency about half the local cyclotron frequency.
    Keywords: GEOPHYSICS
    Type: In: Relation between laboratory and space plasmas; April 14, 15, 1980; Tokyo; Japan
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  • 73
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    Organic inclusions within hydrothermal minerals from S.W. Africa and elsewhere. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: It was observed that quartz crystals from veins within a diabase dike of precambrian age from S.W. Africa contain organic particles which closely resemble, in detailed morphology, coacervates, proteinoid microspheres or fossil and recent microorganisms. The microphotospectrographs in visible and near-ultraviolet light of these minute particles revealed a strong absorption peak at the vicinity of 4000 A, which is indicative of lipids. Hydrothermal mineral from veins from a number of other localities proved to contain the biomorphic organic particles. The theoretical significance of these organic particles is discussed with reference to problems of origin of life.
    Keywords: GEOPHYSICS
    Type: International Meeting on Advances in organic geochemistry 1971; Sept. 7-10, 1971; Hanover; Germany
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  • 74
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    D-region electron density measurements during the solar eclipse of May 20, 1966 (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: D region electron density profiles during solar eclipse from X ray rocket and satellite observations
    Keywords: GEOPHYSICS
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  • 75
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    Mapping northern Atlantic coastal marshlands, Maryland-Virginia, using ERTS imagery (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: The author has identified the following significant results. ERTS-1 data provides repetitive synoptic coverage for DC 00000 of wetland ecology, detection of change, and mapping or inventory of wetland boundaries and plant communities. ERTS-1 positive transparencies of Atlantic Coastal wetlands were enlarged to different scales and mapped using a variety of methods. Results of analysis indicate: (1) mapping of wetland boundaries and vegetative communities from imagery at a scale of 1:1,000,000 is impractical because small details are difficult to illustrate; (2) mapping to a scale of 1:250,000 is practical for defining land-water interface, upper wetland boundary, gross vegetative communities, and spoil disposal/dredge and fill operations; (3) 1:125,000 enlargements provide additional information on transition zones, smaller plant communities, and drainage or mosquito ditching. Overlays may be made directly from prints.
    Keywords: GEOPHYSICS
    Type: E73-10363 , NASA-CR-130996 , Remote Sensing Conf; Tenn. Univ.; Tenn. Univ; united States
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  • 76
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    An ERTS multispectral scanner experiment for mapping iron compounds (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: There are no author-identified significant results in this report. An experimental plan for enhancing spectral features related to the chemical composition of geological targets in ERTS multispectral scanner data is described. The experiment is designed to produce visible-reflective infrared ratio images from ERTS-1 data. Iron compounds are promising remote sensing targets because they display prominent spectral features in the visible-reflective infrared wavelength region and are geologically significant. The region selected for this ERTS experiment is the southern end of the Wind River Range in Wyoming. If this method proves successful it should prove useful for regional geologic mapping, mineralogical exploration, and soil mapping. It may also be helpful to ERTS users in scientific disciplines other than geology, especially to those concerned with targets composed of mixtures of live vegetation and soil or rock.
    Keywords: GEOPHYSICS
    Type: E72-10181 , NASA-CR-128330 , REPT-011676-1-S-SA , Symp. on Remote Sensing of Env
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  • 77
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    Fourth Annual Earth Resources Program Review. Volume 1: National Aeronautics and Space Administration programs (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: Conference on earth resources program with emphasis on NASA programs - Vol. 1
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-68564 , MSC-05937-VOL-1
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  • 78
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    Satellite observed ozone variations and solar activity (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The degree of association between total and stratospheric ozone and solar ultraviolet irradiance is evaluated based on mean monthly latitudinally averaged ozone observations from the Nimbus-4 BUV data set. The mean monthly 10.7 cm solar flux f(10.7), adjusted for varying earth-sun distance, is used as a convenient index of solar UV variation. Results show no obvious relationship between total ozone and solar ultraviolet irradiance based on analysis of satellite data over a period of seven years, even though such a relationship has been suggested from theoretical considerations. However, the analysis does indicate that there may be a positive response in the upper tropical stratosphere, at a height of about 45-50 km such that there is an increase in the ozone concentration following an increase in solar UV radiation, which is assumed to be indicated by an increase in f(10.7) flux
    Keywords: GEOPHYSICS
    Type: International Conference on Environmental Pollution; Sept. 21-25, 1981; Salonika; Greece
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  • 79
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    Mesoscale deformation of sea ice from satellite imagery (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E73-11153 , NASA-CR-135741 , Interdisciplinary Symp. on Advanced Concepts and Tech. in the Study of Snow and Ice Resources; 2-6, Dec. 1973; Monterey, CA; United States
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  • 80
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    Ionospheric effects in solar eclipses (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Ionospheric effects in solar eclipse compared with full sun conditions at same elevation angle, emphasizing E, F and D regions ion and electron composition
    Keywords: GEOPHYSICS
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  • 81
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    X-rays from an auroral substorm at altitudes of 60-80 km and 15-20 km (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A technique for the measurement of high altitude X-rays associated with auroral events is described. The instrument package is boosted to the lower D region by a rocket and descends slowly by parachute. This arrangement facilitates coordination with the launching of other rocket probes during events of interest. A flight on Feb. 2, 1973 from the Churchill Research Range provided 17 minutes of X-ray data above 28 km. The flight was made into an intense break-up event and X-ray fluxes were observed during two episodes of the explosive phase. The reduction of auroral absorption during the later phases of the event suggests precipitation of energetic electrons unaccompanied by the lower energy precipitation responsible for the absorption earlier in the substorm.
    Keywords: GEOPHYSICS
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  • 82
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    Ion composition during the formation of a mid-latitude Es layer (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The positive ion composition within a mid-latitude sporadic E layer has been measured with the aid of a rocketborne ion mass spectrometer launched from El Arenosillo, Spain on July 3, 1972 at 0743 LMT. Ionograms taken before and during the rocket flight showed a developing sporadic E layer near 114 km. Rocket data showed peaks in electron density and metallic ions at this same height. Both the maximum and total content of the metals are observed to be greater on the downleg than on the upleg measurement.
    Keywords: GEOPHYSICS
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  • 83
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    Recent results from satellite beacon measurements (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A review is made of the techniques for measuring ionospheric electron content, the most important parameter in the study of transionospheric propagation. Data collected since 1964 have yielded a synoptic description of the behavior of the electron content in mid-latitudes. Empirical relationships between the level of solar activity and the electron content have been developed permitting the prognostication of the electron content values. Marked discrepancies between prognostication and observation which occur during ionospheric storms are being studied to identify their causes. Electron content bite-outs during solar eclipses fall off with distance from totality more rapidly than simple theory predicts suggesting the action of eclipse induced neutral winds. Gravity waves propagating in the thermosphere leave a signature in the electron content records. Studies of such records have allowed the identification of the position of the gravity wave source, and its radiation pattern.
    Keywords: GEOPHYSICS
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  • 84
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    Preliminary analysis of an extensive one year survey of trace elements and compounds in the suspended particulate matter in Cleveland, Ohio (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Preliminary review of a study of trace elements and compound concentrations in the ambient suspended particulate matter in Cleveland, Ohio, measured from August 1971 through June 1973, as a function of source, monitoring location, and meteorological conditions. The study is aimed at the development of techniques for identifying specific pollution sources which could be integrated into a practical system readily usable by an enforcement agency.
    Keywords: GEOPHYSICS
    Type: Earth Environmental Resources Conference; Sept. 10-12, 1974; Philadelphia, PA
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  • 85
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    Remote profiling of lake ice thickness using a short pulse radar system aboard a C-47 aircraft (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Description of the design and operation of two new short-pulse radar systems developed for use aboard aircraft for remote profiling of lake ice thickness. The principle of operation is based on the fact that the return signal is composed of a pulse return from the top of the ice and another, delayed in time, from the ice-water interface. The delay time between these two pulses directly gives the ice thickness when allowance is made for the slower RF propagation through the ice. The two systems are the S band and the C band systems, and their comparative merits are discussed.
    Keywords: GEOPHYSICS
    Type: Earth Environment and Resources Conference; Sept. 10-12, 1974; Philadelphia, PA
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  • 86
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    Science and software support for spacecraft solar occultation experiments (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The temperature dependence of absorption coefficients of ozone was studied between 7567 A and 3630 A. When the gas was cooled from room temperature to -108 C, an overall increase in the absorption coefficients was noticed. The maximum increase of 5% occurred at lambda = 6020 A. In general, the absorption is linearly dependent on temperature.
    Keywords: GEOPHYSICS
    Type: NASA-CR-169073 , NAS 1.26:169073 , PTR-82-5
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  • 87
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    Evaluation of Skylab imagery as an information service for investigating land use and natural resources (Skylab) (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10644 , NASA-CR-138826
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  • 88
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    All-Digital precision processing of ERTS images (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10637 , NASA-CR-138811
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  • 89
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    Develop techniques and procedures, using multispectral systems, to identify from remotely sensed data the physical and thermal characteristics of plants and soil (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10309 , NASA-CR-136791
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  • 90
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    Develop techniques and procedures, using multispectral systems, to identify from remotely sensed data the physical and thermal characteristics of plants and soil (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10310 , NASA-CR-136792
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  • 91
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    Evaluation of the application of ERTS-1 data to the regional land use planning process (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The author has identified the following significant results. Investigators have concentrated on efforts toward assessing the achievements of the current ERTS-1 research so that significant results could be incorporated into the updated version of their ERTS-B research proposal. Significant progress was made in the development of operational mechanisms, linking the research community at the University and the operation agencies of the State of Wisconsin. Efforts have been made to finalize a report which is being prepared for the State of Wisconsin Department of Administration, evaluating the applicability of ERTS-1 to the planning needs of the State of Wisconsin. This document is intended to assess the degree of utility of the satellite for providing information which has been designated by state planners as essential to their needs. This effort is considered highly significant to the overall research program since a situation has been created in which a prime potential user of ERTS type data has been given the opportunity to determine the direction of the research.
    Keywords: GEOPHYSICS
    Type: E74-10315 , NASA-CR-136800
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  • 92
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    Feasibility of using S-191 infrared spectra for geological studies from space (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10285 , NASA-CR-136671
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  • 93
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    A joint meteorological, oceanographic and sensor evaluation program for experiment S193 on Skylab (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified signficant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10233 , NASA-CR-136496
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  • 94
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    A study to explore the use of remote sensing to determine native arid plant distribution (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10256 , NASA-CR-136584
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  • 95
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    ERTS-1 data user investigation of the use of ERTS imagery in reservoir management and operation (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10223 , NASA-CR-136486 , PR-8
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  • 96
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    Study of the application of remote sensing data to land use planning on the Mississippi Gulf Coast (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10115 , NASA-CR-136127 , PR-6
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  • 97
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    Remote sensing in Iowa agriculture (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The author has identified the following significant results. Analysis of 1972 single-date coverage indicated that a complete crop classification was not attainable at the test sites. Good multi-date coverage during 1973 indicates that many of the problems encountered in 1972 will be minimized. In addition, the compilation of springtime imagery covering the entire state of Iowa has added a new dimension to interpretation of Iowa's natural resources. ERTS-1 has provided data necessary to achieve the broad synoptic view not attainable through other means. This should provide soils and crop researchers and land use planners a base map of Iowa. Granted and due to the resolution of ERTS-1, not all details are observable for many land use planning needs, but this gives a general and current view of Iowa.
    Keywords: GEOPHYSICS
    Type: E74-10167 , NASA-CR-136294
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  • 98
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    Application of ERTS-A data to agricultural practices in the Mississippi Delta region (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10112 , NASA-CR-136108 , PR-5
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  • 99
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    A study to explore the use of remote sensing to determine native arid plant distribution (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10099 , NASA-CR-136090
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  • 100
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    Detection and monitoring of vegetation damage associated with highway facilities (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10076 , NASA-CR-135813 , PR-8
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