Single factor atmospheric polarization modeling method based on Rayleigh scattering

Abstract

The invention provides a single factor atmospheric polarization modeling method based on Rayleigh scattering, comprising the following steps: selecting the observation point and establishing a celestial coordinate system and obtaining the current time sun position using the observation time and observation point geographic coordinate; selecting any point to be measured on the celestial sphere surface and solely determining a northeast coordinate system based on the current time sun position using the point to be measured as the coordinate origin; in the northeast coordinate system, decomposing the incidence natural light into two beams of linearly polarized light in same intensity, vertical electric-field vibration direction, no fixed phase relation, and computing the scattered light electric field strength component under linearly polarized light incidence. The method uses the electric intensity vector to describe light wave and uses the vector size of the scattered light electric field strength component to obtain the polarization degree of the point to be measured and uses the vector direction of the scattered light electric field strength component to obtain the polarization direction of the point to be measured, thus the distributed model of the all-day atmospheric polarization information is obtained and the accuracy and the expansibility of the atmospheric polarization model is increased.

Description

technical field [0001] The invention belongs to the fields of intelligent information processing and physical optics, and relates to a modeling method of an atmospheric polarization mode, in particular to a single-factor atmospheric polarization modeling method based on Rayleigh scattering. Background technique [0002] Before entering the earth's atmosphere, sunlight, as a natural light source of transverse electromagnetic waves, has no polarization. During the transmission of sunlight after entering the atmosphere, due to the scattering of light by air molecules and aerosol particles in the atmosphere and hydrosphere, as well as the reflection of light by water surfaces and other surfaces such as soil, rocks or vegetation, etc. The polarized light forms a specific polarization distribution, called the atmospheric polarization mode. [0003] Atmospheric polarization mode is one of the important properties of the earth, which can provide the direction field and intensity fi...

AI Technical Summary

Problems solved by technology

However, most of the existing single-factor atmospheric polarization models based on Rayleigh scattering use the scalar quantity of light intensity to describe the light wave, and use the geometric relationship between the sun position and the measured point position to derive the distribution of polarization information. The physical process of scattering is expressed and analyzed, and the scalar value of polarization angle in the model cannot accurately describe the polarization direction information

In addition, because the existing model avoids the expression and analysis of the actual physical optical process, it cannot be extended from the single-factor atmospheric polarization model to the actual atmospheric polarization model affected by multiple factors, which affects the accuracy of atmospheric polarization model modeling and scalability

Images