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Title: The HYDROS radiometer/radar instrument
Authors: Spencer, Michael W.
Njoku, Eni
Entekhabi, Dara
Doiron, Terence
Piepmeier, Jeffrey
Girard, Ralph
Keywords: soil moisture
freeze thaw
Issue Date: 20-Sep-2004
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004.
Citation: IEEE International Geoscience and Remote Sensing Symposium, Anchorage, Alaska, September 20-24, 2004.
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.
Appears in Collections:JPL TRS 1992+

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