Evaluation of the validated Soil Moisture product from the SMAP radiometer

P. O'Neill, S. Chan, A. Colliander, S. Dunbar, Eni G Njoku, R. Bindlish, F. Chen, T. Jackson, Mariko Burgin, J. Piepmeier, S. Yueh, Dara Entekhabi, Michael Cosh, T Grant Caldwell, J. Walker, X. Wu, Aaron A Berg, T. Rowlandson, Alfredo Pacheco, H. McNairnM. Thibeault, Jose Martinez-Fernandez, A. Gonzalez-Zamora, M. Seyfried, David D. Bosch, P. Starks, David Goodrich, J. Prueger, M. Palecki, Emma E Small, Marek M Zreda, Jean-Christophe Calvet, Wade Crow, Yann Kerr

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

17 Citations (Scopus)


NASA's Soil Moisture Active Passive (SMAP) mission launched on January 31, 2015 into a sun-synchronous 6 am/6 pm orbit with an objective to produce global mapping of high-resolution soil moisture and freeze-thaw state every 2-3 days using an L-band (active) radar and an L-band (passive) radiometer. The SMAP radiometer began acquiring routine science data on March 31, 2015 and continues to operate nominally. SMAP's radiometer-derived soil moisture product (L2-SM-P) provides soil moisture estimates posted on a 36 km fixed Earth grid using brightness temperature observations from descending (6 am) passes and ancillary data. A beta quality version of L2-SM-P was released to the public in September, 2015, with the fully validated L2-SM-P soil moisture data expected to be released in May, 2016. Additional improvements (including optimization of retrieval algorithm parameters and upscaling approaches) and methodology expansions (including increasing the number of core sites, model-based intercomparisons, and results from several intensive field campaigns) are anticipated in moving from accuracy assessment of the beta quality data to an evaluation of the fully validated L2-SM-P data product.

Original languageEnglish
Title of host publication2016 IEEE International Geoscience & Remote Sensing Symposium (IGARSS 2016) - Proceedings
Subtitle of host publicationJuly 10–15, 2016, Beijing, China
EditorsJiancheng SHI, Huadong GUO, Kun-shan CHEN
Place of PublicationPiscataway NJ
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9781509033324, 9781509033317
ISBN (Print)9781509033331
Publication statusPublished - 1 Nov 2016
EventIEEE International Geoscience and Remote Sensing Symposium 2016 - China National Convention Center, Beijing, China
Duration: 10 Jul 201615 Jul 2016
Conference number: 36th
https://ieeexplore.ieee.org/xpl/conhome/7592514/proceeding (Proceedings)


ConferenceIEEE International Geoscience and Remote Sensing Symposium 2016
Abbreviated titleIGARSS 2016
Internet address


  • accuracy assessment
  • cal/val
  • passive microwave
  • SMAP
  • soil moisture

Cite this