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  • SPACE SCIENCES  (222)
  • EARTH RESOURCES AND REMOTE SENSING  (98)
  • Chemical Engineering  (43)
  • METEOROLOGY AND CLIMATOLOGY
  • 1980-1984
  • 1970-1974  (370)
  • 1974  (370)
Collection
Keywords
Publisher
Years
  • 1980-1984
  • 1970-1974  (370)
Year
  • 1
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    Six-color photometry of Iapetus, Titan, Rhea, Dione and Tethys (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The extensive photometric observations of Titan, Iapetus, Rhea, Dione and Tethys have made it possible to separate the solar phase and orbital phase contributions to the observed light variations of these satellites. For Titan, the wavelength dependence of its solar phase coefficient has been obtained. This dependence should prove useful in constructing future model atmospheres. The other four satellites show a surprising array of different photometric behaviors. Despite these differences, all four satellites have similar spectral reflectivities. Clearly Iapetus, Rhea, Dione and Tethys are complex objects, varying substantially from one another in surface structure and/or composition.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-139631 , CRSR-579
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Microbial abundance and thermoluminescence of antarctic dry valley soils (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Soil Science; 117; 1, 19; 1974
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    California nearshore processes - ERTS 1 (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The detectability of many nearshore processes from ERTS is made possible due to the suspended sediment present in the coastal waters. From viewing and analyzing the California coastal imagery collected during the last year and a half, the overall current patterns and their changes have become evident. It is now possible to map monthly and seasonal changes that occur throughout the year. The original objectives of detecting currents, sediment transport, estuaries and river discharge have now been expanded to include the use of ERTS information in operational problems of the U.S. Army Corps of Engineers. This incorporates the detected nearshore features into planning and organizing shore protection facilities.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: International Symposium on Remote Sensing of Environment; Apr 15, 1974 - Apr 19, 1974; Ann Arbor, MI
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The magnetosphere of Jupiter as observed with Pioneer 10. I - Instrument and principal findings (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Description of the first in situ observations of energetic electrons of energy greater than 0.06 MeV in the magnetosphere of Jupiter during November-December 1973. The outer magnetosphere has the form of a thin disklike quasi-trapping region extending from about 20 to over 100 Jovian radii. This magnetodisk is confined near the magnetic equatorial plane and has approximate axial symmetry about the magnetic axis of the planet. The observations inside a radial distance of 12 Jovian radii are well organized by a centered dipolar model of the planet's magnetic field with a tilt of 9.5 plus or minus 0.5 deg to the rotational axis and with pole at a system III longitude of 230 plus or minus 3 deg. Absolute omnidirectional intensities of electrons within the stable trapping region inside 20 Jovian radii are given for five energy ranges greater than 0.06, 0.55, 5.0, 21, and 31 MeV.
    Keywords: SPACE SCIENCES
    Type: AD-A000274 , Journal of Geophysical Research; 79; Sept. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    A search for 5 min periodic structure in solar 2 cm emission (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Two hundred and eighty-five hours of solar data obtained from a 2 cm radiometer during 1968-1969 were analyzed for evidence of periodic structure related to the 5 min periodic chromospheric oscillations detected in optical line emissions. A power spectral analysis of the data failed to show any statistically significant periodic activity in the frequency range 1-15 mHz for data organized according to solar activity in H-alpha, soft solar X-rays (2-12 A), and several microwave frequencies (3-15 GHz). A small shift in power from low to higher frequencies in the power spectrum of the 2 cm data was found to be correlated with H-alpha and X-ray activity. This power shift is attributed to a relative increase in chromospheric turbulence at altitudes common to H-alpha, X-ray, and 2 cm emission.
    Keywords: SPACE SCIENCES
    Type: AD-782881 , Solar Physics; 35; Mar. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Energetic electrons in the magnetosphere of Jupiter (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observations of energetic electrons (above 7 MeV) show that the outer magnetosphere of Jupiter consists of a thin disklike, quasi-trapping region extending from about 20 to 100 planetary radii. This magnetodisk is confined to the vicinity of the magnetic equatorial plane and appears to be an approximate figure of revolution about the magnetic axis of the planet. Hard trapping is observed within a radial distance of about 20 Jovian radii. The omnidirectional intensity of electrons with energy above 21 MeV between 3 and 20 Jovian radii is described by a provisional expression in terms of radial distance and magnetic latitude. There is tentative evidence for mild effects of the Galilean satellite Europa and possibly Io and Ganymede but not Callisto.
    Keywords: SPACE SCIENCES
    Type: Science; 183; Jan. 25
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Mission design for a ballistic slow-flyby of comet Encke 1980 (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Preliminary mission analyses for a proposed 1980 slow flyby (7 to 9 km/sec) of comet Encke are presented. Among the topics covered are: science objectives, Encke's physical activity and ephemeris accuracy, trajectory and launch-window analysis, terminal guidance, and spacecraft concepts. The nominal mission plan calls for a near-perihelion intercept with two spacecraft using a single launch vehicle. Both spacecraft arrive at the same time, one passing within 500 km from Encke's nucleus on its sunward side, the other cutting through the tail region. By applying a small propulsive correction about three weeks after the encounter, it is possible to retarget both spacecraft for a second Encke intercept in 1984. The potential science return from the ballistic slow flyby is compared with other proposed mission modes for the 1980 Encke flyby mission including the widely advocated slow flyby using solar-electric propulsion. It is shown that the ballistic slow flyby is superior in every respect.
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 74-219 , Aerospace Sciences Meeting; Jan 30, 1974 - Feb 01, 1974; Washington, DC
    Format: text
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  • 8
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    Selected satellite data on snow and ice in the Great Lakes basin 1972-73 /IFYGL/ (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Three snow-extent maps of the Lake Ontario drainage basin were prepared from NOAA-2 satellite visible band images during the International Field Year for the Great Lakes. These maps are discussed and the satellite data are evaluated for snow-extent mapping. The value of ERTS-1 imagery and digital data is also discussed in relation to the Lake Ontario basin studies. ERTS-1 MSS data are excellent for ice identification and analysis but are not useful for forecasting where timely receipt of data is imperative. NOAA-2 VHRR data are timely but the lower resolution of the VHRR makes identification of certain ice features difficult. NOAA-2 VHRR is well suited for snow-extent maps and thermal maps of large areas such as the 19,000 sq-km Lake Ontario basin.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: International Association for Great Lakes Research, Annual Conference; Aug 12, 1974 - Aug 14, 1974; Ontario; Canada
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Variability of the observed temperature, 20-60 km at 80 deg N to 40 deg S (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results are presented for a periodic analysis of atmospheric temperature variations at heights of from 20 to 60 km between 80 deg N and 40 deg S. The analysis is based on Meteorological Rocket Network temperatures not corrected for solar radiation or aliasing by the diurnal tide, and the frequencies examined include the long-term mean, the quasi-biennial oscillation (QBO), and the first six harmonics of the annual wave. Amplitudes are plotted for the long-term mean and QBO as well as for the annual, semiannual, and terannual components. The results show two distinct annual oscillations (the high-latitude one and another above the tropical stratopause) and a polar semiannual wave with two centers of large amplitude that are 90 deg out of phase and separated by a zone of minimum amplitude near 45 km.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Conference on Aerospace and Aeronautical Meteorology; Nov 12, 1974 - Nov 15, 1974; El Paso, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
    Electronic Resource
    Electronic Resource
    Turbulent drag reduction in fiber-polymer systems: Specificity considerations (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 1218-1219 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200626
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    Paper (German National Licenses)
    Fulltext
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