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Proceedings Paper

Soil Moisture Active/Passive (SMAP) Mission concept
Author(s): D. Entekhabi; T. J. Jackson; E. Njoku; P. O'Neill; J. Entin
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Paper Abstract

Soil Moisture Active/Passive (SMAP) Mission is one of the first satellites being developed by NASA in response to the National Research Council's Decadal Survey. SMAP will make global measurements of the moisture present at Earth's land surface and will distinguish frozen from thawed land surfaces. Direct observations of soil moisture and freeze/thaw state from space will allow better estimates of water and energy transfers between Earth's surface and atmosphere, which are primary driving factors for weather and climate. Soil moisture measurements are also of great importance in assessing flooding potential and as input to flood prediction models. Conversely, observations of widespread low soil moisture levels can provide early warning of drought conditions, reduced water supply and crop loss. SMAP observations can help mitigate these natural hazards, resulting in potentially great economic and social benefits. SMAP freeze/thaw timing observations will also reduce a major uncertainty in quantifying the global carbon balance and will help resolve the problem of the missing carbon sink. The SMAP mission concept would utilize L-band radar and radiometry. These instruments will share a rotating 6-meter mesh antenna to provide high-resolution and high-accuracy global maps of soil moisture and freeze/thaw state every two to three days.

Paper Details

Date Published: 10 September 2008
PDF: 6 pages
Proc. SPIE 7085, Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II, 70850H (10 September 2008); doi: 10.1117/12.795910
Show Author Affiliations
D. Entekhabi, Massachusetts Institute of Technology (United States)
T. J. Jackson, U.S. Dept. of Agriculture (United States)
E. Njoku, Jet Propulsion Lab. (United States)
P. O'Neill, NASA Goddard Space Flight Ctr. (United States)
J. Entin, NASA Headquarters (United States)

Published in SPIE Proceedings Vol. 7085:
Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II
Mitchell D. Goldberg; Hal J. Bloom; Philip E. Ardanuy; Allen H.-L. Huang, Editor(s)

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