[仿真]Simulation of Passive Microwave Penetration Features in Dry Medium

Abstract-The simulation of passive microwave penetration +1_NB;,e  
features in dry medium is very important to estimate the dry Lxs  
medium thickness, especially to retrieve the lunar regolith ]^E<e!z={$  
thickness, which is one of the Chinese lunar exploration missions. ;QS-a  
Based on layered dry medium model and radiative transfer fyh9U_M);w  
equation, the microwave penetration features in dry medium are }c$Zlb  
studied in the paper. The results show that the microwave can L`tr7EEr  
penetrate bigger depth in low frequencies than that in high w8c71C  
frequencies. There exists a maximum penetration thickness thmax(f) >q"mI6F  
to every frequency, and thmax(f) declines sharply with the jq%Qc9y  
increasing of frequency. The brightness temperature increases +%o
XPG?  
monotonically with the dry medium thickness if the thickness is ' FF@I^O  
smaller than thmax(f). The dielectric constants of the dry medium )}tI8  
play an important role in evaluating the microwave penetration j$,:cN  
features. According to the results, a look-up table between dry R>yoMk/u  
medium thickness and brightness temperature is generated, which G-~+FnUC  
provides a new and efficient way to extract the thickness of dry [a`89'"z  
medium. )Z,O*u*  
Keywo .. 0M>+.}e+  
zXIVHC,"{  

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