Remote Sensing of Ocean Dynamics Parameters by Wide‐Beam High‐Frequency Hybrid Sky‐Surface Wave Radar: Localization of Sea Surface Scattering Points and Decontamination of Semi‐Physical Ionosphere Phase

Abstract

AbstractThis study addresses the issue of locating the scattering points on the sea surface and rectifying the interference caused by the ionosphere phase in the remote sensing of ocean dynamics parameters. Wide‐beam high‐frequency hybrid sky‐surface wave radar (WB‐HFSSWR) was used for this purpose. In order to mitigate the impact of ionosphere phase contamination on the electron density variation along the sky‐wave path of a radio wave, we present two algorithms: the WB‐HFSSWR Single‐Station sea surface scattering point localization algorithm (WB‐SPLA) and the semi‐physical ionosphere phase decontamination algorithm (SP‐IPDA). Compared with the currently employed ionosphere phase decontamination algorithm, the SP‐IPDA algorithm exhibited enhanced physical characteristics. To evaluate the efficacy of the proposed algorithms, we calculate the root‐mean‐square errors (RMSEs) of the elliptical current velocity (vE‐IRI and vE‐GST) of the WB‐HFSSWR, based on the SP‐IPDA and generalized S‐transform algorithm (GST). The results demonstrated that the RMSEs of vE‐IRI and vE‐GST were comparable to the precision of the bistatic surface‐wave radar elliptical current velocity. The data volume of vE‐IRI was 20.5% larger than that of vE‐GST, and vE‐IRI was more precise than vE‐GST, with RMSEs of 11.98 and 12.63 cm/s, respectively. Furthermore, on the common sea surface scattering points, the precision of vE‐IRI was approximately 18.4% higher than that of vE‐GST.