Recent advances in microwave sensing of soil moisture

Manfred Owe; Richard A. de Jeu

doi:10.1117/12.454189

28 January 2002 Recent advances in microwave sensing of soil moisture

Manfred Owe, Richard A. de Jeu

Proceedings Volume 4542, Remote Sensing for Agriculture, Ecosystems, and Hydrology III; (2002) https://doi.org/10.1117/12.454189
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

Abstract

A new approach for retrieving surface soil moisture from satellite microwave brightness temperature is described. The approach uses radiative transfer theory together with a non- linear optimization routine to partition the observed microwave signal into its soil and vegetation components. Vegetation optical depth is derived directly from the microwave polarization difference index, while the soil component is solved in terms of the soil dielectric constant. A global data base of soil physical properties is then used to derive soil moisture from the soil dielectric constant. The approach is tested with historical SMMR data to produce time series of surface soil moisture over several global test sites. Comparisons with ground observations of soil moisture are made. Preliminary results over several global test sites are provided.

Citation Download Citation

Manfred Owe and Richard A. de Jeu "Recent advances in microwave sensing of soil moisture", Proc. SPIE 4542, Remote Sensing for Agriculture, Ecosystems, and Hydrology III, (28 January 2002); https://doi.org/10.1117/12.454189

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