Published January 2024
| Version 1
Dataset
Open
3km SMAP/CYGNSS Soil Moisture
Creators
- 1. University of Colorado Boulder
- 2. Muon Space
Description
3km SMAP/CYGNSS soil moisture is a downscaled Soil Moisture Active Passive (SMAP) soil moisture product. We downscaled 9km SMAP enhanced brightness temperatures by merging them with L-band Cyclone Global Navigation Satellite System (CYGNSS) reflectivity data, using a modified version of the SMAP active-passive brightness temperature algorithm. We then calculated 3km SMAP/CYGNSS soil moisture using the resulting 3km SMAP/CYGNSS brightness temperatures and the SMAP single channel vertically-polarized soil moisture algorithm (SCA-V). To remedy the sparse daily coverage of CYGNSS data at 3km spatial resolution, we used spatially interpolated CYGNSS data to downscale SMAP soil moisture. 3km interpolated SMAP/CYGNSS soil moisture has a repeat period of ~2-3 days.
Files
2019_01.zip
Files
(198.3 GB)
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Additional details
Related works
- Is derived from
- Dataset: 10.5067/4DQ54OUIJ9DL (DOI)
- Dataset: 10.5067/CYGNS-L1X21 (DOI)
Dates
- Created
-
2023-10 / 2023-12
References
- Chan, S.K., Bindlish, R., Neill, P.O., Jackson, T., Njoku, E., Dunbar, S., Chaubell, J., Piepmeier, J., Yueh, S., Entekhabi, D., Colliander, A., Chen, F., Cosh, M.H., Caldwell, T., Walker, J., Berg, A., Mcnairn, H., Thibeault, M., Martínez-fernández, J., Uldall, F., Seyfried, M., Bosch, D., Starks, P., Holi, C., Prueger, J., Velde, R.V.D., Asanuma, J., Palecki, M., Small, E.E., Zreda, M., Calvet, J., Crow, W.T., Kerr, Y., 2018. Development and assessment of the SMAP enhanced passive soil moisture product. Remote Sens. Environ. 204, 931–941. https://doi.org/10.1016/j.rse.2017.08.025
- Chew, C., 2021. Spatial interpolation based on previously-observed behavior: a framework for interpolating spaceborne GNSS-R data from CYGNSS. J. Spat. Sci. 00, 1–14. https://doi.org/10.1080/14498596.2021.1942253
- Entekhabi, D., Njoku, E.G., O'Neill, P.E., Kellogg, K.H., Crow, W.T., Edelstein, W.N., Entin, J.K., Goodman, S.D., Jackson, T.J., Johnson, J., Kimball, J., Piepmeier, J.R., Koster, R.D., Martin, N., McDonald, K.C., Moghaddam, M., Moran, S., Reichle, R., Shi, J.C., Spencer, M.W., Thurman, S.W., Tsang, L., Van Zyl, J., 2010. The Soil Moisture Active Passive (SMAP) Mission. Proc. IEEE 98, 704–716. https://doi.org/10.1109/JPROC.2010.2043918
- Ruf, C.S., Chew, C., Lang, T., Morris, M.G., Nave, K., Ridley, A., Balasubramaniam, R., 2018. A New Paradigm in Earth Environmental Monitoring with the CYGNSS Small Satellite Constellation. Scientific Reports 8, 1–13. https://doi.org/10.1038/s41598-018-27127-4
- Wernicke, L.J., Chew, C.C., Small, E.E., Das, N.N., 2022. Downscaling SMAP Brightness Temperatures to 3 km Using CYGNSS Reflectivity Observations: Factors That Affect Spatial Heterogeneity. Remote Sens. 14, 5262. https://doi.org/10.3390/rs14205262
- Wernicke, L.J., Chew, C.C., Small, E.E., 2024. Spatially Interpolated CYGNSS Data Improve Downscaled 3 km SMAP/CYGNSS Soil Moisture. Remote Sens. 16, 2924. https://doi.org/10.3390/rs16162924