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  • OCEANOGRAPHY  (2)
  • EARTH RESOURCES AND REMOTE SENSING  (1)
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  • 1
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    The western Mediterranean Sea: An area for a regional validation for TOPEX/Poseidon and a field for geophysical and oceanographic studies (1991)
    In:  CASI
    Details
    Publication Date: 2006-06-13
    Description: The research project has two kinds of objectives. The first is focused on the regional validation of the altimeter, orbit, and mean sea surface; it will be performed in close cooperation with the local validation performed at Lampedusa/Lampione (Italy). The second deals with the geophysical and oceanographic research of interest in this area.
    Keywords: OCEANOGRAPHY
    Type: JPL, TOPEX(Poseidon Science Investigations Plan; p 18-22
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Somali current studied from SEASAT altimetry (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Mesoscale variability has been obtained for the world ocean from satellite altimetry by using the repetitive tracks data of SEASAT. No significant results were obtained for the Somali current area for two main reasons: the repetitive tracks are too sparse to cover the expected eddy pattern and these data were obtained in late September and early October when the current is strongly decaying. The non-repetitive period of SEASAT offers the possibility to study a dozen of tracks parallel to the eddy axis or crossing it. These are used here to deduce the dynamic topography of the Somali current. Data error reduction and tide and orbit corrections are addressed. A local geoid was built using a collocation inverse method to combine surface gravity data and altimetry: the repetitive tracks show no variability (which confirms that the current is quasi-inexistent at that time) and can be used as data for the local geoid. This should provide a measure of the absolute dynamic topography of the Somali current.
    Keywords: OCEANOGRAPHY
    Type: NASA. Marshall Space Flight Center Frontiers of Remote Sensing of the Oceans and Troposphere from Air and Space Platforms; p 497-499
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Gradio: Project proposal for satellite gradiometry (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A gradiometric approach, rather than the more complicated satellite to satellite tracking, is proposed for studying anomalies in the gravitational fields of the Earth and, possibly, other telluric bodies. The first analyses of a gradiometer based on four of ONERA's CACTUS or SUPERCACTUS accelerometers are summarized. it is shown that the obstacles to achieving the required accuracy are not insuperable. The device will be carried in a 1000 kg lens shaped satellite in a heliosynchronous orbit 200 to 300 km in altitude. The first launching is planned for the end of 1987.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-76796 , NAS 1.15:76796
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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