Quantitative analysis of influencing factors and interactions of thermal infrared polarization of water

Abstract

ABSTRACT Thermal radiation of water is polarized, and thermal infrared polarization characteristics are investigated to detect thermal infrared polarized remote sensing and theoretically support the interpretation of water remote-sensing processes. Quantitative analysis of the influence of detection angle, azimuth angle, wave band and temperature as well as their interactions in various polarized conditions on the thermal infrared polarized characteristics of water is conducted via orthogonal experiment design and spectrum analysis. Results show that the polarized brightness temperature of water decreases with the increase in detection angle and increases with the increase in temperature. Parabolic distribution occurs between the polarized brightness temperature and azimuth angle and the peak of the parabola is located near the azimuth angle of 180°. The polarized brightness temperature in the four wave bands is different and presents distinct characteristics in various detection conditions. The interaction between the temperature and detection angle has an extremely significant effect on the thermal infrared polarized characteristics of water. The research findings contribute new insights into water monitoring by the use of remote-sensing technology for its theoretical significance and practical value of the study in fully utilizing polarized information and promoting the development of quantitative remote sensing.