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United States Department of Agriculture

Agricultural Research Service

Title: A Numerical Simulation of Estimating Soil Moisture with L-Band Radiometer

Authors
item Shi, Jiancheng - UNIV OF CA SANTA BARBARA
item Li, Q. - UNIV OF CA SANTA BARBARA
item Jackson, Thomas
item Chen, K. - NAT. CENTRAL UNIV. TAIWAN
item Njoku, E. - NASA
item O'Neill, P. - NASA

Submitted to: International Geoscience and Remote Sensing Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: June 8, 2001
Publication Date: N/A

Technical Abstract: One advantage of the passive microwave sensors is the quick repeat-time within a few days. Except soil moisture, for most natural surface characteristics, such as surface roughness and vegetation properties, it can be assumed that there is no-change between the repeat measurements (same time during a day). Based on this concept, we have performed numerical simulations for different vegetated surfaces. We found that 1) the relative change between the repeat pass measurements in soil surface reflectivity or soil moisture can be directly estimated; and 2)the scattering component from vegetation can be estimated. The surface soil moisture, therefore, can be inferred from the repeat pass measurements. This technique can significantly increase the radar monitoring capability of the surface soil moisture. Currently, the validation using our collected L-band radiometer data with in-situ measurements is under way.

Last Modified: 9/10/2014
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