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Title:   Author  item
                                            Cosh, Michaelitem
                                            Jackson, Thomasitem
                                            BINDLISH, R. - Science Systems, Incitem
                                            COLLIANDER, ANDREAS - Jet Propulsion Laboratoryitem
                                            McKee, Lynnitem
                                            Starks, Patrickitem
                                            Seyfried, Markitem
                                            Prueger, Johnitem
                                            Livingston, Stanleyitem
                                            Goodrich, David

                                                         - *Dave*item
                                            Bosch, David

                                                         - *Dave*item
                                            Coopersmith, Evanitem
                                            HORNBUCKLE, B. - Iowa State Universityitem
                                            CHAN, S. - Jet Propulsion Laboratoryitem
                                            KIM, S. - Jet Propulsion Laboratoryitem
                                            DAS, N. - Jet Propulsion Laboratoryitem
                                            YUEH, S. - Jet Propulsion Laboratory
  Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/1/2015
                                    Publication  Date: 11/18/2015
                                    Citation: Cosh, M.H., Jackson, T.J., Bindlish, R., Colliander, Andreas, McKee, L.G., Starks, P., Seyfried, M.S., Prueger, J.H., Livingston, S., Goodrich, D.C., Bosch, D.D., Coopersmith, E., Hornbuckle, B., Chan, S., Kim, S., Das, N., Yueh, S. 2015. Initial validation of the Soil Moisture Active Passive mission using USDA-ARS watersheds SSSA-ASA-CSSA Annual Meeting 2015. November 15-18, 2015, Minneapolis, MN. Abstract #403-3.Interpretive Summary:
                                Technical Abstract: The Soil Moisture Active Passive (SMAP) Mission was launched in January 2015 to measure global surface soil moisture.  The calibration and validation program of SMAP relies upon an international cooperative of in situ networks to provide ground truth references across a variety of landscapes.  The USDA Agricultural Research Service operates several experimental watersheds as part of this project with distributed soil moisture networks, measuring soil moisture at a 5 cm depth.  Comparisons of the in situ networks to the satellite products are ongoing, but initial results have shown a good correspondence between satellite estimates and the in situ soil moisture resources, once scaling functions are applied.  The satellite products available are reviewed and the scaling methodologies for the in situ networks are discussed, including lessons learned.  Results from the Little Washita, Fort Cobb, St. Joseph’s and Little River Experimental Watersheds show a good correspondence between the satellite products and in situ estimates.  Reynolds Creek and Walnut Gulch show high accuracy, though with the caveat that these domains are semi-arid with small dynamic range.  The South Fork Watershed is examined more closely for its detailed scaling function development and some apparent bias between the satellite and in situ estimates.


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