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Integrated SMAP and SMOS Soil Moisture Observations
- Publication Year :
- 2019
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 2019.
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Abstract
- Soil Moisture Active Passive (SMAP) mission and the Soil Moisture and Ocean Salinity (SMOS) missions provide brightness temperature and soil moisture estimates every 2-3 days. SMAP brightness temperature observations were compared with SMOS observations at 40o incidence angle. The brightness temperatures from the two missions are close to each other but SMAP observations show a warmer TB bias (about 0.64 K: V pol and 1.14 K: H pol) as compared to SMOS. SMAP and SMOS missions use different retrieval algorithms and ancillary datasets which result in further inconsistencies between their soil moisture products. The reprocessed constant-angle SMOS brightness temperatures (SMOS-SMAP) were used in the SMAP soil moisture retrieval algorithm to develop a consistent multi-satellite product. The integrated product has an increased global revisit frequency (1 day) and period of record that is unattainable by either one of the satellites alone. The SMOS-SMAP soil moisture retrievals compared with in situ observations show a retrieval accuracy of less than 0.04 m3/m3. Results from the development and validation of the integrated soil moisture product will be presented.
- Subjects :
- Earth Resources And Remote Sensing
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Notes :
- 80NM0018D0004P
- Publication Type :
- Report
- Accession number :
- edsnas.20190028773
- Document Type :
- Report