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

Abstract-The simulation of passive microwave penetration  ngJ{az  
features in dry medium is very important to estimate the dry G,+3(C  
medium thickness, especially to retrieve the lunar regolith D'%M#S0  
thickness, which is one of the Chinese lunar exploration missions. 'Sgz\=K  
Based on layered dry medium model and radiative transfer fHwS12SB  
equation, the microwave penetration features in dry medium are %p7onwKq0  
studied in the paper. The results show that the microwave can nm_ta
ER  
penetrate bigger depth in low frequencies than that in high g`Q!5WK*  
frequencies. There exists a maximum penetration thickness thmax(f) #zgO_H  
to every frequency, and thmax(f) declines sharply with the *Cp:
<Mnd  
increasing of frequency. The brightness temperature increases DGTE#?'(  
monotonically with the dry medium thickness if the thickness is mQt0?c _  
smaller than thmax(f). The dielectric constants of the dry medium x8c>2w;6x^  
play an important role in evaluating the microwave penetration toU<InN  
features. According to the results, a look-up table between dry
6*EIhIQ(  
medium thickness and brightness temperature is generated, which Wcm'E3c,  
provides a new and efficient way to extract the thickness of dry (Qo
jIdHt  
medium. mm*nXJ  
Keywo .. 6)ysiAH?  
Gh6U<;V?*  

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