Extraction of Significant Wave Height from Spreading First-Order Bragg Peaks of Shipborne High-Frequency Surface Wave Radar with a Single Antenna
Year: 2025
Type: article
Abstract: Shipborne high-frequency surface wave radar (HFSWR) can extend the measurement area due to the flexible movement of the platform and provide a new way to monitor large-area marine environment parameters. It has already been applied to wind and current measurements. However, extracting significant wave height using shipborne HFSWR presents challenges due to the complex effects of platform motion on the Doppler spectrum, which invalidate onshore methods. To address this, a novel method for extracting significant wave height from the spreading first-order Bragg peaks of shipborne HFSWR with a single antenna is proposed, which is immune to inevitable antenna pattern distortion and especially suitable for the space-constrained shipborne HFSWR. The method sequentially estimates wind directions, spreading parameters, and wind speeds from Bragg peaks and develops a new relationship between significant wave height and wind speed to enable wave height extraction. Additionally, a preprocessing step is introduced to mitigate the impact of noise and discretization errors. Simulations and field experiments validate the feasibility and accuracy of the method across various scenarios, with a detection range of up to 120 km without auxiliary measurements. Comparisons between the radar-extracted and fifth-generation European Centre for Medium-Range Weather Forecasts reanalysis (ERA5) or buoy-measured results demonstrate consistency.
Source: Remote Sensing
DOI: 10.3390/rs17061006
Authors: Xinbo Zhang, Junhao Xie, Guowei Yao, Chenghui Cao
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,258
OpenAlex ID: W4408411403