嫦娥三號測距測速雷達(dá)回波的數(shù)值仿真
發(fā)布時間:2019-04-29 15:36
【摘要】:中國嫦娥三號(Chang’e-3,CE-3)著陸器裝載多波束測距測速雷達(dá),實(shí)現(xiàn)對軟著陸過程的控制.論文對CE-3擬著陸點(diǎn)虹灣地區(qū)的雷達(dá)回波信號進(jìn)行電磁散射仿真.基于月球虹灣地區(qū)高分辨率數(shù)字地型模型(Digital Terrain Model,DTM),利用高頻基爾霍夫近似(Kirchhoff Analysis,KA)方法分析雷達(dá)降落過程中回波功率和散射系數(shù)的特性,分析雷達(dá)波束角、頻率、極化等參數(shù)對回波功率和散射系數(shù)(Normalized Radar Cross Section,NRCS)特性的影響.
[Abstract]:The Chinese Chang'e-3 (Chang'e-3,CE-3) lander is equipped with multi-beam ranging radar to control the soft landing process. In this paper, the radar echo signal in Hongwan area of CE-3 landing point is simulated by electromagnetic scattering. Based on the high resolution digital terrain model (Digital Terrain Model,DTM) in Hongwan area of the Moon, the characteristics of echo power and scattering coefficient during radar landing are analyzed by using the high frequency Kirchhoff approximation (Kirchhoff Analysis,KA) method, and the beam angle and frequency of radar are analyzed. The effects of polarization and other parameters on the echo power and scattering coefficient (Normalized Radar Cross Section,NRCS) characteristics.
【作者單位】: 復(fù)旦大學(xué)電磁波信息科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(編號:61001007)
【分類號】:TN957.52
本文編號:2468327
[Abstract]:The Chinese Chang'e-3 (Chang'e-3,CE-3) lander is equipped with multi-beam ranging radar to control the soft landing process. In this paper, the radar echo signal in Hongwan area of CE-3 landing point is simulated by electromagnetic scattering. Based on the high resolution digital terrain model (Digital Terrain Model,DTM) in Hongwan area of the Moon, the characteristics of echo power and scattering coefficient during radar landing are analyzed by using the high frequency Kirchhoff approximation (Kirchhoff Analysis,KA) method, and the beam angle and frequency of radar are analyzed. The effects of polarization and other parameters on the echo power and scattering coefficient (Normalized Radar Cross Section,NRCS) characteristics.
【作者單位】: 復(fù)旦大學(xué)電磁波信息科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(編號:61001007)
【分類號】:TN957.52
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