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  • EARTH RESOURCES AND REMOTE SENSING  (98)
  • ASTROPHYSICS
  • ENERGY PRODUCTION AND CONVERSION
  • METEOROLOGY AND CLIMATOLOGY
  • 1985-1989
  • 1980-1984
  • 1970-1974  (152)
  • 1945-1949
  • 1974  (152)
Collection
Keywords
Years
  • 1985-1989
  • 1980-1984
  • 1970-1974  (152)
  • 1945-1949
Year
  • 1
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    A brief description of geological and geophysical exploration of the Marysville geothermal area (1974)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Extensive geological and geophysical surveys were carried out at the Marysville geothermal area during 1973 and 1974. The area has high heat flow (up to microcalories per square centimeter-second, a negative gravity anomaly, high electrical resistivity, low seismic ground noise, and nearby microseismic activity. Significant magnetic and infrared anomalies are not associated with the geothermal area. The geothermal anomaly occupies the axial portion of a dome in Precambrian sedimentary rocks intruded by Cretaceous and Cenozoic granitic rocks. The results from a 2.4-km-deep test well indicate that the cause of the geothermal anomaly is hydrothermal convection in a Cenozoic intrusive. A maximum temperature of 95 C was measured at a depth of 500 m in the test well.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 98-110
    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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  • 3
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    On the e-process - Its components and their neutron excesses (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The pattern of abundances within the iron-abundance peak of the solar system is analyzed for various Cr, Fe, and Ni abundances, and a method is developed for finding the best fit to a given set of abundances with a chosen number of zones, i.e., mass contributions characterized by differing values of eta. This material can be synthesized by a superposition of e-process compositions in a low-eta region (eta = 0.003) and a high-eta region (eta = 0.065 -0.080) with at least 85% coming from the low-eta region. Addition of a third eta zone is unproductive. The applicability of the particle-poor freeze out is discussed in the light of these abundances, and the results of employing different numbers and types of zones are interpreted as an indication of the relative abundances themselves. Ejection of the low-eta zones is of great interest in gamma-ray astronomy and for empirical testing of theories of nucleosynthesis. The distribution of high zones should give important information about the formation of collapsed remnants.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 193; Oct. 1
    Format: text
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  • 4
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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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  • 5
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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
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  • 6
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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
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    NASA TECHNICAL REPORTS
  • 7
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    Significance of semiannual waves in the mesospheric zonal wind and evidence of influence by the geomagnetic field (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The recently described polar semiannual oscillations in zonal wind can explain midwinter weakening of the polar winter vortex and the relatively short stratospheric and mesospheric summer easterlies. This explanation implies that stratospheric sudden warmings may be caused or affected by the polar semiannual oscillation. Two potential physical mechanisms (not mutually exclusive) for the oscillation are presented: planetary wave action and changes in the radiation field. Radiation absorption changes are suggested to result from changes in ozone concentration during magnetic storms. Contours of amplitude of both the polar and tropical semiannual wind oscillations are more nearly congruent with geomagnetic than with geographic latitude.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: AD-A136747 , Journal of Geophysical Research; 79; Nov. 20
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  • 8
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    The C-12/C-13 ratio in stellar atmospheres. II - CN and CO in alpha Orionis (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The isotopic abundance ratio C-12/C-13 for the M supergiant alpha Orionis is derived from photoelectric high-resolution scans of the CN 2-0 red system and high-resolution interferometric spectra of the CO second-overtone bands. The two molecules yield consistent results and the final value for the C-12/C-13 ratio is 7.0 plus or minus 1.5. Rationale is offered for the causes contributing to an earlier suggestion that C-12/C-13 ratios from CO and CN were in disagreement.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 193; Nov. 1
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  • 9
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    Preliminary results in the comparison of Skylab, ERTS and RB-57 images for the detection of lineaments and fractures in Precambrian, Paleozoic, and late Tertiary rocks on and near the Colorado Plateau, North-Central Arizona (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10060 , NASA-CR-141000
    Format: application/pdf
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  • 10
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    Application of ERTS-1 data to integrated state planning in the state of Maryland (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10264 , NASA-CR-142639
    Format: application/pdf
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