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

Abstract-The simulation of passive microwave penetration H[p~1%Lq  
features in dry medium is very important to estimate the dry e
sA^-$  
medium thickness, especially to retrieve the lunar regolith |(*btdqy3  
thickness, which is one of the Chinese lunar exploration missions. k^8;3#xG  
Based on layered dry medium model and radiative transfer 'l<$H=ZUVG  
equation, the microwave penetration features in dry medium are 0ZDm[#7z  
studied in the paper. The results show that the microwave can l<uI-RX"  
penetrate bigger depth in low frequencies than that in high :FC)+OmJ  
frequencies. There exists a maximum penetration thickness thmax(f) 0@b<?Ms9  
to every frequency, and thmax(f) declines sharply with the W|@SXO)DY  
increasing of frequency. The brightness temperature increases 9&=%shOc+x  
monotonically with the dry medium thickness if the thickness is !PGCoI  
smaller than thmax(f). The dielectric constants of the dry medium NR(rr.  
play an important role in evaluating the microwave penetration 9C,gJp}P  
features. According to the results, a look-up table between dry FT~c|ep.  
medium thickness and brightness temperature is generated, which \mGb|aF8  
provides a new and efficient way to extract the thickness of dry ?>*d82yO  
medium. 5JVBDA^#om  
Keywo .. %A~. NNbS  
,&4 [`d  

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