Lunar soil dielectric constant inversion method for microwave band

Abstract

The invention discloses a lunar soil dielectric constant inversion method for the microwave band, comprising the following steps: obtaining the physical parameters of the surface of the moon, and using a lunar dust-N layers of lunar soil-lunar rock model to calculate the simulated brightness temperature of the surface of the moon; statistically fitting all measured brightness temperature data of integer latitudes such as 0 degree, + / -1 degree, + / -2 degrees... within the range of + / -0.1 degree in the whole moon, using the same curve to carry out fitting for the same latitude, and establishing brightness temperature daily change models of different latitudes; calculating the measured brightness temperature difference Tau1 and the simulated brightness temperature difference Tau2 according to the definition formula of space-time normalized bright temperature difference Tau; and screening and preprocessing the measured brightness temperature difference Tau1, and inverting the lunar soil dielectric constant by use of a multivariable constrained optimization approach. Compared with the existing lunar soil dielectric constant model which is only applicable to frequencies below 1GHZ, the lunar soil dielectric constant model put forward by the invention is applicable to the microwave band and takes into consideration the different influences of the content of minerals such as iron and titanium on the dielectric constant.

Description

technical field [0001] The invention belongs to the field of microwave remote sensing, and more specifically relates to a method for retrieving the dielectric constant of lunar soil in the microwave band. Background technique [0002] As the only natural satellite of the earth, the moon is also the closest planet to the earth, so it is the first goal of human beings to conduct deep space exploration, and it is the first step for human beings to go out of the earth to explore the vast universe. The moon is rich in resources, among which the lunar soil contains a large amount of rich rare gases, the mare basalt contains rich mineral resources such as iron and titanium, and the kryptonite on the moon is rich in potassium, phosphorus and rare earth elements. In addition, the moon is also rich in metal mineral resources such as chromium, nickel, potassium, sodium, magnesium, silicon, and copper. [0003] In order to obtain and utilize the abundant resources on the moon, it is fi...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method for retrieving the permittivity of lunar soil in the microwave band, the purpose of which is to solve the technical problem that the existing permittivity model is not suitable for the microwave band

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