| Popis: |
On Nov 02, 2009, European Space Agency (ESA) launched Soil Moisture and Ocean Salinity (SMOS) mission to monitor surface soil moisture and sea surface salinity using natural L-Band microwave emission. As the operating frequency of SMOS is 1.4 GHz, consequently, in spite of its high temporal resolution (~3 days), has low spatial resolution of ~ 40 km. In the present paper, downscaling of SMOS derived low resolution soil moisture is done by synergistically combining it with high resolution optical/IR data from MODIS over a test site in Gujarat, India and validated the same against ground truth soil moisture data at 1 km spatial resolution. In the validation, it is observed that the difference between downscaled soil moisture (%) and ground truth soil moisture (%) is below 4.12 % for 60% of total datasets and for 90% of total datasets the difference is below 11%. |
