Characteristic Analysis on Ship RCS Detected by FSR Based on GNSS

Maritime target monitoring is one of the important application fields of radar. The traditional radar achieves target detection through its radiation electromagnetic wave, so its concealment is poor. External radiation radar has gradually occurred in the research field. The passive radar based on the Global Navigation Satellite System (GNSS) has the advantage of satellite quantity and all-weather work, but the defect is that the radiated power is weak. By arranging multiple receiving nodes on the coast and constructing the forward-scatter detection structure, the high-level radar cross-section (RCS) can be obtained. Therefore, in this paper, the forward-scatter RCS characteristics of ship targets were studied through electromagnetic simulation, and the effects of different polarization modes, target size, crossing angle, and electromagnetic wave incidence angle on ship RCS were analyzed. The Kolmogorov-Smirnov test was used to compare the statistical modeling results. Results show that the lognormal distribution has a better effect, which provides reference significance for ship target detection with forward scatter radar (FSR) based on GNSS.