Submitted to: International Geoscience and Remote Sensing Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/28/2003
Publication Date: 7/20/2003
Citation: Lakshmi, V., Bolton, J., Narayan, U., Jackson, T.J. 2003. Estimation of Soil Moisture Using Data from Advanced Microwave Scanning Radiometer. International Geoscience and Remote Sensing Symposium. I:416-418. Interpretive Summary:
Technical Abstract: Soil moisture is an important variable controlling biogeochemical cycles, heat exchange and infiltration rates at the land/atmosphere boundary. Previous investigations have shown passive microwave remote sensing effective in the study of soil moisture and precipitation. Overlying vegetation and atmospheric moisture have an effect on the radiation received by the radiometers at the C-band and higher frequencies, and these effects are well documented. Sensitivity of microwave brightness temperatures to land surface variables has been studied with respect to L, S bands and large scale mapping of soil moisture has been accomplished. In this paper, the simulation of the C-band brightness temperatures have been carried out for the SMEX02 (Soil Moisture Experiment 2002) region in Ames, Iowa for the time period June 25 to July 13, 2002. The simulated brightness temperatures have been compared with the corresponding observations using the Advanced Microwave Scanning Radiometer (AMSR). The simulation of microwave brightness temperatures observed by AMSR is the first step towards successful retrievals and use of the retrieved soil moistures in a variety of applications ranging from assimilation in hydrological models to use in agriculture.