EGU21-15123
https://doi.org/10.5194/egusphere-egu21-15123
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Inter-comparison of GNSS-Reflectometry measurements from CYGNSS and Spire’s satellites with SMAP soil moisture product

Vahid Freeman, Philip Jales, Stephan Esterhuizen, Vladimir Irisov, Jessica Cartwright, and Dallas Masters
Vahid Freeman et al.
  • Spire Global, Space Program, Luxembourg (vahid.freeman@spire.com)

The potential of space-borne GNSS-Reflectometry (GNSS-R) technique for soil moisture retrieval has been demonstrated in recent studies using observations from the NASA’s Cyclone Global Navigation Satellite System (CYGNSS) and the UK’s Technology Demonstration Satellite, TechDemoSat (TDS-1).

Spire Global operates a constellation of CubeSats performing GNSS based science and Earth observation. In December 2019, Spire launched two new satellites with GNSS-R payloads with plans to launch two more follow-on GNSS-R missions in January 2021. In this study, we highlight the capabilities of the Spire’s current and future GNSS-R missions compared to CYGNSS for global soil moisture monitoring and present the results of an inter-comparison between CYGNSS and Spire GNSS-R observables over land with NASA’s Soil Moisture Active Passive (SMAP) observations. The comparison of level-1 data and various statistical parameters was performed after data collocation both trackwise and also within a 6km regular grid. The results of the study were used for intercalibration of CYGNSS and Spire’s GNSS-R measurements for developing a combined GNSS-R soil moisture product.

How to cite: Freeman, V., Jales, P., Esterhuizen, S., Irisov, V., Cartwright, J., and Masters, D.: Inter-comparison of GNSS-Reflectometry measurements from CYGNSS and Spire’s satellites with SMAP soil moisture product, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-15123, https://doi.org/10.5194/egusphere-egu21-15123, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.