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  • 11
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    Water quality conditions in San Francisco Bay delta (1976)
    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: E76-10242 , NASA-CR-146525 , PR-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    Improved definition of crustal magnetic anomalies for MAGSAT data (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The routine correction of MAGSAT vector magnetometer data for external field effects such as the ring current and the daily variation by filtering long wavelength harmonics from the data is described. Separation of fields due to low altitude sources from those caused by high altitude sources is affected by means of dual harmonic expansions in the solution of Dirichlet's problem. This regression/harmonic filter procedure is applied on an orbit by orbit basis, and initial tests on MAGSAT data from orbit 1176 show reduction in external field residuals by 24.33 nT RMS in the horizontal component, and 10.95 nT RMS in the radial component.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10314 , NASA-CR-168889 , NAS 1.26:168889
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 13
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    Monitoring water quality by remote sensing (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. A limited study was conducted to determine the applicability of remote sensing for evaluating water quality conditions in the San Francisco Bay and delta. Considerable supporting data were available for the study area from other than overflight sources, but short-term temporal and spatial variability precluded their use. The study results were not sufficient to shed much light on the subject, but it did appear that, with the present state of the art in image analysis and the large amount of ground truth needed, remote sensing has only limited application in monitoring water quality.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E77-10194 , NASA-CR-154259
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 14
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    Garnet and pyroxene compositions in some diamondiferous eclogites (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Analyses are reported for garnet and pyroxene from 17 eclogites that contain diamond. The garnets contain small but significant contents of Na, Ti and P and the pyroxenes contain traces of K. The diamond-bearing eclogites do not constitute a unique compositional group but show a range of mineral compositions consistent with a very high P-T environment.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Contributions to Mineralogy and Petrology; 58; 1976
    Format: text
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    NASA TECHNICAL REPORTS
  • 15
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    Mean sea level determination from satellite altimetry (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The primary experiment on the Geodynamics Experimental Ocean Satellite-3 (GEOS-3) is the radar altimeter. This experiment's major objective is to demonstrate the utility of measuring the geometry of the ocean surface, i.e. the geoid. Results obtained from this experiment so far indicate that the planned objectives of measuring the topography of the ocean surface with an absolute accuracy of + or - 5 meters can be met and perhaps exceeded. The GEOS-3 satellite altimeter measurements have an instrument precision in the range of + or - 25 cm to + or - 50 cm when the altimeter is operating in the short pulse mode.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-X-71298 , X-921-77-41
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 16
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    Surface pressure maps from scatterometer data (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The ability to determine surface pressure fields from satellite scatterometer data was shown by Brown and Levy (1986). The surface winds are used to calculate the gradient winds above the planetary boundary layer, and these are directly related to the pressure gradients. There are corrections for variable stratification, variable surface roughness, horizontal inhomogeneity, humidity and baroclinity. The Seasat-A Satellite Scatterometer (SASS) data have been used in a systematic study of 50 synoptic weather events (regions of approximately 1000 X 1000 km). The preliminary statistics of agreement with national weather service surface pressure maps are calculated. The resulting surface pressure maps can be used together with SASS winds and Scanning Multichannel Microwave Radiometer (SMMR) water vapor and liquid water analyses to provide good front and storm system analyses.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IGARSS ''91: Annual International Geoscience and Remote Sensing Symposium; Jun 03, 1991 - Jun 06, 1991; Espoo; Finland
    Format: text
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    NASA TECHNICAL REPORTS
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