本文選題：雷達(dá)探測儀　切入點：月表層結(jié)構(gòu)　出處：《中國科學(xué):地球科學(xué)》2010年04期

【摘要】：在月球探測中,星載高頻雷達(dá)探測儀(HF Radar Sounder)通過月球表面天底點和次表面天底點的回波時延差與強(qiáng)度探測月球分層結(jié)構(gòu).電磁波在月球分層結(jié)構(gòu)內(nèi)散射與傳播的建模與模擬,對于從雷達(dá)探測儀回波中提取微弱的次表面天底點回波,獲取次表層結(jié)構(gòu)信息等有重要的意義.本文基于粗糙面散射的Kirchhoff近似與幾何光學(xué)射線追蹤,提出月球分層結(jié)構(gòu)雷達(dá)探測回波的模擬方法.根據(jù)月球表面地形特征,由規(guī)則三角形網(wǎng)格對月表面地形進(jìn)行數(shù)值剖分,數(shù)值計算月球表面與次表層面的雷達(dá)回波,模擬繞月飛行的星載雷達(dá)探測儀對月球表面與次表層結(jié)構(gòu)的探測圖像,分析月球表面特征性物理參數(shù)對回波的影響.本文所述方法也可以應(yīng)用到火星等其他外星球次表層結(jié)構(gòu)的探測中.
[Abstract]:In lunar exploration, HF Radar Sounder, a spaceborne high frequency radar detector, detects the layered structure of the moon by the echo delay difference and intensity of the bottom point and the subsurface point of the lunar surface. The modeling and simulation of the scattering and propagation of electromagnetic waves in the layered structure of the moon. It is of great significance to extract weak subsurface bottom-point echo from radar detector echo and obtain subsurface structure information. The Kirchhoff approximation based on rough surface scattering and geometric optical ray tracing are used in this paper. In this paper, a simulation method for lunar layered radar to detect echo is proposed. According to the characteristics of lunar surface topography, the lunar surface topography is numerically dissected by regular triangular meshes, and the radar echo of lunar surface and sub-surface is numerically calculated. Images of the lunar surface and subsurface structures detected by a spaceborne radar detector that simulates lunar flight, The influence of the characteristic physical parameters of the lunar surface on the echo is analyzed. The method presented in this paper can also be applied to the exploration of the subsurface structure of other outer planets such as Mars.
【作者單位】： 復(fù)旦大學(xué)波散射與遙感信息教育部重點實驗室;
【基金】：國家自然科學(xué)基金重點項目(批準(zhǔn)號:40637033)資助
【分類號】：P184.5

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1 法文哲;金亞秋;;雷達(dá)探測儀對月球次表層結(jié)構(gòu)的探測模擬方法[J];中國科學(xué):地球科學(xué);2010年04期

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