Significant Wave Height Estimation Using Multi-Satellite Observations from GNSS-R

Significant Wave Height Estimation Using Multi-Satellite Observations from GNSS-R

Blog Article

This study proposes a significant wave height (SWH) retrieval method based on multi-satellite observations using Global mudra fitted tee Navigation Satellite System Reflectometry (GNSS-R).The algorithm obtains the signal-to-noise ratio (SNR) through delay-Doppler maps (DDMs) and introduces an offset correction that combines the differences between the elevation angles of multi-satellites.The correction improves the correlation between SNR and SWH and thus enables the estimation of SWH.The feasibility of the proposed algorithm was verified by experiments and a performance comparison with the traditional estimation method based on SNR.

The estimation results of the proposed algorithm, with a mean absolute percentage error of 8.26%, a root mean square error of 0.1671 lg up8770 m, and a maximum error of 0.32 m, better matched the true values than the traditional SNR-based method.

The method is intended to improve the retrieval accuracy of SWH based on the GNSS-R technique, and to provide services for sea-state information monitoring and ship navigation.