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the soil moisture active and passive (smap) missionThe Soil Moisture Active and Passive (SMAP) Mission is one of the first Earth observation 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 significantly improved estimates of water, energy and carbon transfers between land and atmosphere. Soil moisture measurements are also of great importance in assessing flooding and monitoring drought. SMAP observations can help mitigate these natural hazards, resulting in potentially great economic and social benefits. SMAP soil moisture and freeze/thaw timing observations will also reduce a major uncertainty in quantifying the global carbon balance by helping to resolve an apparent missing carbon sink on land over the boreal latitudes. The SMAP mission concept would utilize an L-band radar and radiometer. These instruments will share a rotating 6-meter mesh reflector antenna to provide high-resolution and high-accuracy global maps of soil moisture and freeze/thaw state every two to three days. The SMAP instruments provide direct measurements of surface conditions. In addition, the SMAP project will use these observations with advanced modeling and data assimilation to provide deeper root-zone soil moisture and estimates of land surface-atmosphere exchanges of water, energy and carbon. SMAP is scheduled for a 2014 launch date
Document ID
20090038719
Document Type
Preprint (Draft being sent to journal)
Authors
Entekhabi, Dara
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Nijoku, Eni G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
ONeill, Peggy E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kellogg, Kent H.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Crow, Wade T.
(Universities Space Research Association Beltsville, MD, United States)
Edelstein, Wendy N.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Entin, Jared K.
(NASA Headquarters Washington, DC United States)
Goodman, Shawn D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jackson, Thomas J.
(Universities Space Research Association Beltsville, MD, United States)
Johnson, Joel
(Ohio State Univ. Columbus, OH, United States)
Kimball, John
(Montana Univ. Polson, MT, United States)
Piepmeier, Jeffrey R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Koster, Randal D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
McDonald, Kyle C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moghaddam, Mahta
(Michigan Univ. Ann Arbor, MI, United States)
Moran, Susan
(Universities Space Research Association Tucson, AZ, United States)
Reichle, Rolf
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shi, J. C.
(California Univ. Santa Barbara, CA, United States)
Spencer, Michael W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Thurman, Samuel W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tsang, Leung
(Washington Univ. Seattle, WA, United States)
VanZyl, Jakob
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2009
Subject Category
Earth Resources and Remote Sensing
Distribution Limits
Public
Copyright
Public Use Permitted.

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