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Assessment of Version 4 of the SMAP Passive Soil Moisture Standard ProductNASAs Soil Moisture Active Passive (SMAP) mission launched on January 31, 2015 into a sun-synchronous 6 am6 pm orbit with an objective to produce global mapping of high-resolution soil moisture and freeze-thaw state every 2-3 days. The SMAP radiometer began acquiring routine science data on March 31, 2015 and continues to operate nominally. SMAPs radiometer-derived standard soil moisture product (L2SMP) provides soil moisture estimates posted on a 36-km fixed Earth grid using brightness temperature observations and ancillary data. A beta quality version of L2SMP was released to the public in October, 2015, Version 3 validated L2SMP soil moisture data were released in May, 2016, and Version 4 L2SMP data were released in December, 2016. Version 4 data are processed using the same soil moisture retrieval algorithms as previous versions, but now include retrieved soil moisture from both the 6 am descending orbits and the 6 pm ascending orbits. Validation of 19 months of the standard L2SMP product was done for both AM and PM retrievals using in situ measurements from global core calval sites. Accuracy of the soil moisture retrievals averaged over the core sites showed that SMAP accuracy requirements are being met.
Document ID
20170007421
Document Type
Conference Paper
Authors
O'neill, P. O. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chan, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bindlish, R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Jackson, T. (Agricultural Research Service Beltsville, MD, United States)
Colliander, A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dunbar, R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chen, F. (Agricultural Research Service Beltsville, MD, United States)
Piepmeier, Jeffrey R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Yueh, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Entekhabi, D. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Cosh, M. (Agricultural Research Service Beltsville, MD, United States)
Caldwell, T. (Texas Univ. Austin, TX, United States)
Walker, J. (Monash Univ. Victoria, Australia)
Wu, X. (Monash Univ. Victoria, Australia)
Berg, A. (Guelph Univ. Ontario, Canada)
Rowlandson, T. (Guelph Univ. Ontario, Canada)
Pacheco, A. (Ministry of Agriculture and Food Guelph, Ontario, Canada)
McNairn, H. (Ministry of Agriculture and Food Guelph, Ontario, Canada)
Thibeault, M. (National Commission of Space Activities Buenos Aires, Argentina)
Martínez-Fernández, J. (Instituto Nacional de Investigaciones Agrarias Madrid, Spain)
González-Zamora, A. (Instituto Nacional de Investigaciones Agrarias Madrid, Spain)
Lopez-Baeza, E. (Valencia Univ. Spain)
Udall, F. (Technical Univ. of Denmark Copenhagen, Denmark)
Seyfried, M. (Agricultural Research Service Beltsville, MD, United States)
Bosch, D. (Agricultural Research Service Beltsville, MD, United States)
Starks, P. (Agricultural Research Service Beltsville, MD, United States)
Holifield, C. (Agricultural Research Service Beltsville, MD, United States)
Prueger, J. (Agricultural Research Service Beltsville, MD, United States)
Su, Z. (Twente Univ. Netherlands)
Van der Velde, R. (Twente Univ. Netherlands)
Asanuma, J. (Tsukuba Univ. Japan)
Palecki, M. (National Oceanic and Atmospheric Administration Highlands, NJ, United States)
Small, E. (Colorado Univ. Boulder, CO, United States)
Zreda, M. (Arizona Univ. Phoenix, AZ, United States)
Calvet, J-C. (Centre National de Recherches Meteorologiques Toulouse, France)
Crow, W. (Centre National d'Etudes Spatiales Aire-sur-l'Adour, France)
Kerr, Y. (Centre National d'Etudes Spatiales Aire-sur-l'Adour, France)
Date Acquired
August 8, 2017
Publication Date
July 23, 2017
Subject Category
Earth Resources and Remote Sensing
Report/Patent Number
KJR-339
GSFC-E-DAA-TN41665
Meeting Information
IEEE International Geoscience and Remote Sensing Symposium 2017(Fort Worth, TX)
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
SMAP
soil moisture
passive microwave

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