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The HYDROS radiometer/radar instrument

Show simple item record Spencer, Michael W. Njoku, Eni Entekhabi, Dara Doiron, Terence Piepmeier, Jeffrey Girard, Ralph 2008-04-18T20:35:58Z 2008-04-18T20:35:58Z 2004-09-20
dc.identifier.citation IEEE International Geoscience and Remote Sensing Symposium, Anchorage, Alaska, September 20-24, 2004. en_US
dc.identifier.clearanceno 04-2048
dc.description.abstract The science objectives of the HYDROS mission are to provide frequent, global measurements of surface soil moisture and surface freeze/thaw state. In order to adequately measure these geophysical quantities, the key instrument requirements were determined by the HYDROS science team to be: 1) Dual-polarization L-Band passive radiometer measurements at 40 km resolution, 2) Dual-polarization L-Band active radar measurements at 3 km resolution, and 3) A wide swath to insure global three day refresh time for these measurements (1000 km swath at the selected orbit altitude of 670 km). As a solution to this challenging set of instrument requirements, a relatively large, 6 meter, conically-scanning reflector antenna architecture was selected for the instrument design. The deployable mesh antenna is shared by both the radiometer and radar electronics by employing a single L-Band feed. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en_US
dc.subject soil moisture en_US
dc.subject freeze thaw en_US
dc.subject radiometer en_US
dc.subject radar en_US
dc.title The HYDROS radiometer/radar instrument en_US
dc.type Preprint en_US

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