IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing | |
Very High Spatial Resolution Downscaled SMAP Radiometer Soil Moisture in the CONUS Using VIIRS/MODIS Data | |
Venkat Lakshmi1  Bin Fang2  Christopher Hain3  Michael Cosh4  | |
[1] Department of Engineering Systems and the Environment, University of Virginia, Charlottesville, VA, USA;Engineering Systems and Environment, University of Virginia, Charlottesville, VA, USA;NASA, Marshall Space Flight Center, Huntsville, AL, USA;USDA Agricultural Research Service, Hydrology and Remote Sensing Laboratory, Beltsville, MD, USA; | |
关键词: Downscaling algorithm; moderate resolution imaging spectroradiometer (MODIS); North America Land Data Assimilation System (NLDAS); soil moisture active and passive (SMAP); visible infrared imaging radiometer suite (VIIRS); | |
DOI : 10.1109/JSTARS.2021.3076026 | |
来源: DOAJ |
【 摘 要 】
Satellite remote sensing has been providing passive microwave soil moisture (SM) retrievals of a global spatial coverage and a high revisit frequency for research and applications in earth and environmental sciences, specifically after the soil moisture active and passive (SMAP) was launched in 2015. But, the spatial resolution of SM data is restricted to tens of kilometers, which is insufficient for regional or watershed scale studies. In this article, an SM downscaling algorithm was developed based on the vegetation modulated apparent thermal inertia relationship between SM and changes in land surface temperature (LST). The algorithm used data sets from the North America Land Data Assimilation System Noah model outputs and the advanced very high resolution radiometer data of the long term data record from 1981 to 2018. Here, the downscaling model was applied to visible/infred LST data from the visible infrared imaging radiometer suite at 400-m and the moderate resolution imaging spectroradiometer at 1 km to downscale the L2 radiometer half-orbit 9 km SMAP SM from 2018 to 2019 for the contiguous United States. The 400-m/1-km downscaled SM products were validated using 125
【 授权许可】
Unknown