Fig. 1. Schematic diagram of oblique imaging under thermal radiation environment

Fig. 2. Schematic diagram of azimuth relationship in BRDF

Fig. 3. Schematic diagram of photon scattering in sea fog medium

Fig. 4. Spectral distribution of particle concentration in advection fog

Fig. 5. Flow chart of Monte-Carlo simulation

Fig. 6. Variation of degree of linear polarization of reflected and spontaneous thermal radiation with observation angle

Fig. 7. Variation of degree of linear polarization of target/background contrast with observation angle

Fig. 8. Variation of degree of linear polarization with observation angle under different thermal radiation environment

Fig. 9. Variation of degree of linear polarization with observation angle under different roughness levels

Fig. 10. Variation of degree of linear polarization and intensity with observation distance （Visibility：8 km）