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Mapping without the sun
Zhang, Jixian

transmissivity is computed using NDWI from Landsat TM,
then, volume and interaction scatter are removed from
observations based on some assumptions, finally, soil moisture
change estimation algorithm is developed using surface scatter
at two acquisitions. The results are validated using in-situ
samples of 0-1 cm. The results showed than the algorithm can
1 Measured

•• .!/
Fig.2 The Validation of results for both soybean and com field at four polarizations
be used at L-band, but not at S-band. It is the key in future
work that the algorithm will be advanced to be used at higher
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This work was supported by funds from NSFC and CAS under
grants 40671140 and kzcx2-yw-301. The EnviSat ASAR data
were provided by ESA through the Category-1 ID: 1406.