Validation of NOAA CyGNSS Wind Speed Product with the CCMP Data

The National Aeronautics and Space Administration (NASA) Cyclone Global Navigation Satellite System (CyGNSS) mission was launched in December 2016, which can remotely sense sea surface wind with a relatively high spatio-temporal resolution for tracking tropical cyclones. In recent years, the gradual development of geophysical model function (GMF) CyGNSS retrieval, different versions Level 2 products have been released their performance has gradually improved. This paper presents comprehensive evaluation product v1.1 produced by Oceanic Atmospheric (NOAA). Cross-Calibrated Multi-Platform (CCMP) analysis (v02.0 v02.1 near real time) Remote Sensing Systems (RSS) were used as reference. Data pairs between NOAA RSS CCMP processed evaluated bias standard deviation SD. dataset covers period May 2017 2020. statistical comparisons show that SD relative to CCMP-nonzero collocations when flag winds is nonzero are –0.05 m/s 1.19 m/s, respectively. probability density (PDF) coincides CCMP-nonzero. Furthermore, average monthly consistent reliable generally. We found negative mainly appears at latitudes both hemispheres. Positive China Sea, Arabian west Africa South America. Spatial–temporal demonstrates geographical anomalies winds, confirming speed shows temporal dependency. verification comparison sensed measurements from good agreement winds.