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Soil Moisture Retrieval During a Corn Growth Cycle using L-band (1.6 GHz) Radar ObservationsNew opportunities for large-scale soil moisture monitoring will emerge with the launch of two low frequency (L-band 1.4 GHz) radiometers: the Aquarius mission in 2009 and the Soil Moisture and Ocean Salinity (SMOS) mission in 2008. Soil moisture is an important land surface variable affecting water and heat exchanges between atmosphere, land surface and deeper ground water reservoirs. The data products from these sensors provide valuable information in a range of climate and hydrologic applications (e.g., nume~cal weather prediction, drought monitoring, flood forecasting, water resources management, etc.). This paper describes a unique data set that was collected during a field campaign at OPE^ (Optimizing Production Inputs for Economic and Environmental Enhancements) site in Beltsville, Maryland throughout the eompj2ete corn growing in 2002. This investigation describes a simple methodology to correct active microwave observations for vegetation effects, which could potentially be implemented in a global soil moisture monitoring algorithm. The methodology has been applied to radar observation collected during the entire corn growth season and validation against ground measurements showed that the top 5-cm soil moisture can be retrieved with an accuracy up to 0.033 [cu cm/cu cm] depending on the sensing configuration.
Document ID
20070035137
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Joseph, Alicia T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
vanderVelde, Rogier (International Inst. for Geoinformation Science and Earth Observation Enschedule, Netherlands)
O'Neill, Peggy E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lang, Roger (George Washington Univ. Washington, DC, United States)
Gish, Tim (Agricultural Research Service Beltsville, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2007
Subject Category
Earth Resources And Remote Sensing
Distribution Limits
Public
Copyright
Public Use Permitted.

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