Development of a soil moisture retrieval algorithm for spaceborne passive microwave radiometers and its application to AMSR-E and SSM/I

This paper reports the development of a soil moisture retrieval algorithm for spaceborne passive microwave radiometers. The algorithm is based on a modified radiative transfer model, so-called DMRT-AIEM model. The implementation of this algorithm consists of three steps: 1) forward model parameters...

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Published in2007 IEEE International Geoscience and Remote Sensing Symposium pp. 1177 - 1180
Main Authors Lu, Hui, Koike, Toshio, Ohta, Tetsu, Kuria, David Ndegwa, Tsutsui, Hiroyuki, Graf, Tobias, Fujii, Hideyuki, Tamagawa, Katsunori
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2007
Subjects
AMSR-E
Brightness temperature
Frequency estimation
Information retrieval
microwave measurement; brightness temperature
Moisture measurement
passive
Passive microwave remote sensing
Radiometers
remote sensing
satellite
Soil measurements
Soil moisture
SSM/I
Table lookup
Vegetation
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Summary:This paper reports the development of a soil moisture retrieval algorithm for spaceborne passive microwave radiometers. The algorithm is based on a modified radiative transfer model, so-called DMRT-AIEM model. The implementation of this algorithm consists of three steps: 1) forward model parameters optimization; 2) lookup table generation and 3) lookup table reversion and soil moisture estimation. The algorithm was tested at a CEOP (coordinate enhanced observing period) reference site on the Mongolia Gobi. The retrieved soil moisture data was compared with the in situ observations. The comparison results show that the performance of the new algorithm is good, giving a standard error of the estimate (SEE) of 3.8% and R-square of 0.4. Moreover, a successful TB validation on SSM/I low frequencies was achieved by the RTM used in this algorithm. It means this algorithm provides a possibility to retrieval around 20 years' soil moisture data from SSM/I observations.
ISBN:9781424412112
1424412110
ISSN:2153-6996
2153-7003
DOI:10.1109/IGARSS.2007.4423014