研究目的
Investigating the impact of acquisition geometry and received signal polarization on ship detectability in GNSS-R data.
研究成果
The backscattering geometry and RHCP channel are more suitable for ship detection in GNSS-R data, providing significant improvements in SNCR. Ships up to 20 m in length can be detected under certain conditions, but detection performance is highly dependent on sea state and ship orientation.
研究不足
The study is based on numerical simulations and assumes specific conditions such as a resolution cell size of 10×10 km2 and certain parameter values for GPS and TDS-1. The detectability of ships is highly dependent on sea state and ship orientation, with limitations in detecting ships at certain aspect angles.
1：Experimental Design and Method Selection:
The study evaluates the impact of acquisition geometry and signal polarization on ship detectability using a numerical tool for the bistatic radar cross section of the ship.
2：Sample Selection and Data Sources:
The analysis assumes a ship target of 300×60×10 m3 and uses parameter values for GPS as the transmitting GNSS and TDS-1 as the GNSS-R receiver.
3：List of Experimental Equipment and Materials:
The study utilizes a numerical tool for evaluating the bistatic RCS of the ship, with parameters such as transmitted power, antenna gains, and signal wavelength specified.
4：Experimental Procedures and Operational Workflow:
The SNCR is evaluated for different sea states, ship aspect angles, and GNSS look angles, comparing forward-scattering and backscattering geometries and LHCP vs. RHCP channels.
5：Data Analysis Methods:
The SNCR is calculated based on received power from the ship and sea surface, and thermal noise power, with results presented as functions of ship aspect angle and sea state.
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