Submitted to: Proceedings of SPIE
Publication Type: Proceedings
Publication Acceptance Date: 9/1/2007
Publication Date: 10/1/2007
Citation: Du, J., Jackson, T.J., Bindlish, R., Li, L. 2007. WindSat passive microwave polarimetric observations of soil moisture and land variables. In: Proceedings of the International Society of Optical Engineering, Earth Observing Systems XII, September 17-20, 2007, Florence, Italy. 6677:1I1-1I7. Interpretive Summary:
Technical Abstract: WindSat is a spaceborne multi-frequency polarimetric microwave radiometer and has the potential of contributing to the retrieval of land variables and complementing efforts directed at the Aqua AMSR-E. In this study, a previously established algorithm was applied to WindSat data to estimate global soil moisture. Comprehensive validation was performed by comparing the retrievals with in situ soil moisture observations from networks located at four soil moisture validation sites. The overall standard error of estimate for surface soil moisture was 0.038 m3/m3. This analysis shows that the WindSat soil moisture retrievals are reasonable and fall within the generally accepted error bounds of 0.04 m3/m3. Larger scale qualitative assessments were performed by analysis of the spatial distribution of soil moisture, which were found to be consistent with the known global climatology. There are other soil moisture algorithms under investigation, however, these result show the potential of the WindSat sensor for soil moisture as well as future operational satellite instruments.