The UCAR/CU CYGNSS Soil Moisture Product

This dataset provides soil moisture retrievals, which have been gridded to 36 km, for the upper 5 cm of the soil surface at sparsely-sampled 6-hour intervals for +/- 38 degrees latitude for 2017 - present. Retrievals are derived from the Cyclone Global Navigation Satellite System (CYGNSS) constellation, which uses GNSS-Reflectometry to obtain L-band surface reflectivity observations over the land and ocean surface. This product, the UCAR/CU CYGNSS Soil Moisture Product, was jointly developed by the University Corporation for Atmospheric Research and the University of Colorado Boulder. It was developed by calibrating observations of surface reflectivity from CYGNSS to soil moisture retrievals from NASA's Soil Moisture Active Passive (SMAP) mission. Retrievals were validated against observations from over 200 in situ soil moisture probes from 5 networks, with an overall unbiased root mean square error (ubRMSE) of 0.047 cm3 cm-3.

To Access Resource:

Questions? Email Resource Support Contact:

  • Clara Chew
    clarac@ucar.edu

Temporal Range

  • Begin:  2017
    End:  2021

Keywords

Resource Type dataset
Temporal Range Begin 2017
Temporal Range End 2021
Temporal Resolution N/A
Bounding Box North Lat 40
Bounding Box South Lat -40
Bounding Box West Long -180
Bounding Box East Long 180
Spatial Representation N/A
Spatial Resolution N/A
Related Links N/A
Additional Information N/A
Resource Format N/A
Standardized Resource Format UNDEFINED FORMAT
Asset Size N/A
Legal Constraints

Data use is subject to UCAR terms of use.
Access Constraints Access Constraints: Data are available for use with no restrictions.
Software Implementation Language N/A

Resource Support Name Clara Chew
Resource Support Email clarac@ucar.edu
Resource Support Organization N/A
Distributor N/A
Metadata Contact Name Clara Chew
Metadata Contact Email clarac@ucar.edu
Metadata Contact Organization N/A

Author Chew, Clara
Small, Eric
Publisher UCAR/NCAR - COSMIC
Publication Date 2019
Digital Object Identifier (DOI) https://doi.org/10.5065/z9nq-8g12
Alternate Identifier N/A
Resource Version N/A
Topic Category N/A
Progress N/A
Metadata Date 2022-11-18T13:19:09.680766
Metadata Record Identifier 10.5065/z9nq-8g12
Metadata Language eng
Suggested Citation Chew, Clara, Small, Eric. (2019). The UCAR/CU CYGNSS Soil Moisture Product. UCAR/NCAR - COSMIC. https://doi.org/10.5065/z9nq-8g12. Accessed 25 October 2025.

Harvest Source