A Method for Establishing the Dielectric Constant Model of Lunar Soil

Abstract

The invention discloses a method for establishing a regolith dielectric constant model. The method includes the following steps: acquiring the physical temperature of the lunar surface in actual measured data; sectioning the physical temperature within the range of the lunar temperature, and acquiring the brightness temperature in actual measurement and the physical temperature in actual measurement of corresponding temperature section; acquiring the physical parameters of the lunar surface, and resolving the equation of heat conduction so as to acquire a temperature profile matrix, and based on the physical temperature in actual measurement, selecting a temperature profile; establishing an initial regolith dielectric constant model, and based on the initial regolith dielectric constant model and the temperature profile, calculating an analog brightness temperature of the lunar surface; and using the multi-constrained control optimization method in inversion to obtain the regolith dielectric constant model parameter. According to the invention, the regolith dielectric constant model established based on the method can obtain the analog brightness temperature which highly matches the temperature in actual measurement.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing, and more specifically relates to a method for establishing a lunar soil dielectric constant model. Background technique [0002] Visible light, infrared, γ-ray and other remote sensing technologies have been widely used in the detection of the lunar surface, but affected by the penetration depth, these detection methods can only provide information on the lunar surface, but cannot reveal the dust covered by the lunar surface. Features such as subsurface geological landforms and crustal structures buried in lunar soil, lunar soil, etc. Space-borne microwave remote sensing technology is applied to the detection of the lunar surface and deep structures. Since the lunar soil is a low-loss medium, electromagnetic waves can penetrate a certain depth below the lunar surface to obtain the characteristics of the lunar soil layer and subsurface structure below the lunar surface. [0003] ...

AI Technical Summary

Problems solved by technology

The existing lunar soil dielectric constant model does not consider the influence of physical temperature on the lunar soil brightness temperature, and the temperature profile selected for calculating the simulated brightness temperature is not accurate. The simulated brightness temperature obtained through this type of lunar soil dielectric constant model Compared with the measured brightness temperature of the lunar surface, the error is large

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