Analysis and research on polarized radiation characteristics of ship targets at sea

Abstract

The traditional ship infrared detection method cannot solve the edge details when the ship target interacts flexibly with the sea surface background. Polarization detection technology has gradually become an important research direction for high-precision detection of marine targets because of its advantages of acquiring the intrinsic characteristics of targets. This paper selects the typical part panels and scaled models of ships as experimental research object, focusing on the analysis of the polarized radiation characteristics of marine ship targets. Starting from the principle of polarization detection, we extended the application of the bidirectional polarization reflection distribution function that can obtain the polarization spectral characteristics of the target. According to the principle of time-sharing polarization detection, we designed a simulation experiment scheme for the polarization characteristics of the typical parts of the ship and the overall model related to the sea surface background. Finally, we implemented the measurement experiment of multi-angle polarization characteristics in the field and performed data analysis. The results show that: (1) The polarization reflectivity and polarization degree of the typical parts of the ship tend to be consistent with the changes of the observation geometric conditions, both increase with the increase of the observation zenith angle, and the forward scattering area is larger than the back scattering area. (2) The observation direction has a great influence on the overall detection results of the ship. When using the 30°zenith angle of the forward scattering area of the main plane for observation, the contrast between the ship and the water body is obvious, and it is easy to detect the ship.