How GNSS reflectometry works

Map of GNSS reflections (blue) and collocated NDBC Buoys (red)

Nadir antenna installed on UKM-DMC satellite

The SGR-ReSI is a remote sensing instrument based upon SSTL’s GNSS (Global Navigation
Satellite System) technology, targeting ocean, land, cryospheric and atmospheric applications.

The SGR-ReSI is a remote sensing instrument based upon SSTL’s GNSS (Global Navigation
Satellite System) technology, targeting ocean, land, cryospheric and atmospheric applications.

Global wind speed recorded by TechDemoSat-1 from May 2015 – Feb 2016

Orthogonal distance regression of buoy and TOPEX measurements of zero-crossing period, Tz, for the complete TOPEX mission. The slope of the best-fit regression, B, and the intercept, A, are shown with the 95% confidence limits. The cross-correlation coefficient, r, is 0.867. After rejection of 3*rmse outliers, a new best fit can be derived and plotted (not shown), with r improving to 0.901.

Location of collocated JASON-1 and buoy measurements: in total, 152 NDBC buoys are used in this study. Altimeters examined include both dual-frequency (TOPEX, ENVISAT, JASON-1) and single-frequency (ERS-2, Poseidon and Geosat Follow-On).

Sentinel-1 Synthetic Aperture Radar image of Jersey and Guernsey

TechDemoSat-1 (TDS-1) at Surrey Satellite Technology Ltd

http://www.sstl.co.uk

UK TechDemoSat-1 with SGR-ReSI GPS-R payload launching on a Russian Soyuz, July 2014

http://www.bbc.co.uk