Fig. 1. Schematic diagram of the interaction principle between the medium layers

Fig. 2. Basic procedure of atmospheric polarization mode based on RT3

Fig. 3. Stratification of the atmosphere and advection fog environment. (a) Clear sky without cloud; (b) cloudy sky

Fig. 4. Normalized particle size distribution for cloud layer and advection fog layer. (a) Cloud; (b) advection fog

Fig. 5. Sky polarization distribution of atmosphere scattering. (a) Simulation method based on RT3; (b) atmospheric theory model based on Rayleigh scattering

Fig. 6. Relationship between DOP and observed altitude angle on the meridian of the sun

Fig. 7. Relationship between DOP and observed altitude angle under heavy and moderate advection fog

Fig. 8. Relationship between DOP and observed altitude angle under advection fog with maritime cumulus and stratus. (a) Heavy advection fog with maritime cumulus and stratus; (b) moderate advection fog with maritime cumulus and stratus

Fig. 9. Relationship between DOP and observed altitude angle under heavy and moderate advection fog with cloud layer. (a) Heavy and moderate advection fog with maritime cumulus;(b) heavy and moderate advection fog with maritime stratus