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

Abstract-The simulation of passive microwave penetration J9\a{c;.  
features in dry medium is very important to estimate the dry $aN-Y?U%  
medium thickness, especially to retrieve the lunar regolith v2H#=E4cZ#  
thickness, which is one of the Chinese lunar exploration missions. ;]gP@h/  
Based on layered dry medium model and radiative transfer OiE;B  
equation, the microwave penetration features in dry medium are qduWzxB  
studied in the paper. The results show that the microwave can YnxRg  
penetrate bigger depth in low frequencies than that in high ]8icBneA~'  
frequencies. There exists a maximum penetration thickness thmax(f) P(XaTU&-  
to every frequency, and thmax(f) declines sharply with the iCW*]U  
increasing of frequency. The brightness temperature increases DXa=|T  
monotonically with the dry medium thickness if the thickness is 4hAl-8~Q6  
smaller than thmax(f). The dielectric constants of the dry medium _~q?
_'kx  
play an important role in evaluating the microwave penetration %F:)5gT?  
features. According to the results, a look-up table between dry EL8NZ%:v:  
medium thickness and brightness temperature is generated, which rS4@1`/R  
provides a new and efficient way to extract the thickness of dry mp9{m`Jb*  
medium. VH=S?_RY>  
Keywo .. &Y 4F!Rb  
W D T]!  

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