Submitted to: International Geoscience and Remote Sensing Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/10/2003
Publication Date: 7/20/2003
Citation: Jackson, T.J., Bindlish, R., Klein, M., Gasiewski, A., Njoku, E. 2003. Soil moisture retrieval and AMSR validation using an airborne microwave radiometer in SMEX02. International Geoscience and Remote Sensing Symposium Proceedings. I:401-403. Interpretive Summary:
Technical Abstract: Field experiments were conducted to evaluate the effects of dense agricultural crop conditions on soil moisture retrieval using passive microwave remote sensing. Aircraft observations were collected using a new version of the Polarimetric Scanning Radiometer (PSR) that provided four C band and four X band frequencies. Observations were also available from the Aqua satellite Advanced Microwave Scanning Radiometer (AMSR-E) at these same frequencies. Soil Moisture Experiments 2002 (SMEX02) was conducted over a three-week period during the summer near Ames, Iowa, which is dominated by corn and soybeans. Aircraft data were processed and channels selected to minimize radio frequency interference. A preliminary comparison of the aircraft (PSR) and satellite (AMSR-E) 10.7 GHz data showed comparable brightness temperature values for X band. Sensitivity of brightness temperature to soil moisture was observed for nearly all the ground validation sites, even under dense corn canopies. Similar sensitivities were observed for C and X band channels. These results suggest that there is the potential to develop soil moisture retrieval techniques for a wide range of agricultural conditions using AMSR-E frequencies.