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  • GEOPHYSICS  (4)
  • 1970-1974  (4)
  • 1940-1944
  • 1930-1934
Collection
Keywords
Years
Year
  • 1
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    Unknown
    Effects of atmospheric aerosols on scattering reflected visible light from earth resource features (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The vertical variations in atmospheric light attenuation under ambient conditions were identified, and a method through which aerial photographs of earth features might be corrected to yield quantitative information about the actual features was provided. A theoretical equation was developed based on the Bouguer-Lambert extinction law and basic photographic theory.
    Keywords: GEOPHYSICS
    Type: NASA-CR-139382
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A global magnetic anomaly map (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A subset of POGO satellite magnetometer data has been formed that is suitable for analysis of crustal magnetic anomalies. Using a thirteenth order field model, fit to these data, magnetic residuals have been calculated over the world to latitude limits of plus 50 deg. These residuals averaged over one degree latitude-longitude blocks represent a detailed global magnetic anomaly map derived solely from satellite data. Preliminary analysis of the map indicates that the anomalies are real and of geological origin.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-70628 , X-922-74-98 , NSSDC-ID-65-081A-05-PS , NSSDC-ID-67-073A-06-PS , NSSDC-ID-69-051A-21-PS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    The detection of 'intermediate' size magnetic anomalies in Cosmos 49 and OGO 2, 4, 6 data. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Benkova, Dolginov and Simonenko have recently reported the presence of intermediate size magnetic anomalies from Cosmos 49 data and hypothesized a crustal and/or upper mantle origin for these. We have examined the spherical harmonic models of the internal potential function, based on the OGO 2, 4 and 6 data and verified the locations and amplitudes of those anomalies with wavelengths of approximately 4000 km. The patterns of delta-F so computed were then compared with the IZMIRAN maps and also were analyzed statistically, in both the spatial and frequency domains, using residuals computed from the raw Cosmos 49 data. The two sets of data were thus derived from completely independent sets of observations and field references. The two patterns are shown to agree very well over the whole earth surface up to the 50 deg latitude limit of Cosmos 49.
    Keywords: GEOPHYSICS
    Type: NSSDC-ID-65-081A-05-PS , NSSDC-ID-67-073A-06-PS , NSSDC-ID-69-051A-21-PS , Plenary Meeting on Space research XIII; May 10, 1972 - May 24, 1972; Madrid; Spain
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    The detection of intermediate size magnetic anomalies in Cosmos-49 and OGO-2, 4, and 6 data (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Benkova, Dolginov, and Simonenko have recently reported the presence of intermediate size magnetic anomalies in the data from COSMOS-49 and hypothesized a crustal and/or upper mantle origin. The spherical harmonic models of the internal potential function were examined, based on the OGO-2, 4, and 6 data (POGO (10/68) and later models), and verified the locations and amplitudes of those anomalies whose wavelengths approximate 4000 km. The comparison was made by subtracting a field model developed with a truncated series of n* = 9 from one computed with n* = 11 and generating a residual map equivalent to the COSMOS-49 data. The patterns of delta F so computed from POGO were then compared with the IZMIRAN maps and also were analyzed statistically, in both the spatial and frequency domains, using residuals computed from the raw COSMOS-49 data with the n* = 9 COSMOS-49 field model as reference. The two sets of data were thus derived from completely independent sets of observations and field references. The two patterns are shown to agree very well over the whole earth surface up to the 50 deg latitude limit of COSMOS-49.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-66225 , X-645-73-89
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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