CAJ | 학술논문

全球地表雷达后向散射系数(NRCS)的统计特性分析是开展星载降水测量雷达(SPR)系统论证的基础，但大范围、长时间地表NRCS的测量难度大、费用高，目前，我国Ku频段小入射角大范围地表NRCS的测量、统计特性研究几乎还处于空白状态。该文提出利用热带降水测量计划(TRMM)卫星2011年度观测数据对全球地表NRCS 进行了统计特性分析，得到了NRCS 的均值、均方差等统计量与入射角的关系。在此基础上，分析了其对星载降水测量雷达的系统动态范围、天线旁瓣、脉冲压缩旁瓣、雷达定标等方面系统设计的影响，为我国星载降水测量雷达的系统指标论证和定标方法的优化选择提供了依据。
전구지표뢰체후향산사계수(NRCS)적통계특성분석시개전성재강수측량뢰체(SPR)계통론증적기출，단대범위、장시간지표NRCS적측량난도대、비용고，목전，아국Ku빈단소입사각대범위지표NRCS적측량、통계특성연구궤호환처우공백상태。해문제출이용열대강수측량계화(TRMM)위성2011년도관측수거대전구지표NRCS 진행료통계특성분석，득도료NRCS 적균치、균방차등통계량여입사각적관계。재차기출상，분석료기대성재강수측량뢰체적계통동태범위、천선방판、맥충압축방판、뢰체정표등방면계통설계적영향，위아국성재강수측량뢰체적계통지표론증화정표방법적우화선택제공료의거。
The analysis on the statistical characteristics of the surface Normalized Radar Cross Section (NRCS) is the foundation of the Spaceborne Precipitation Radar (SPR) system design, but it is very difficult and costly to measure the global NRCS in long time and the study results about the Ku band global NRCS at small incidence angles are very few in China. In this paper, statistical analysis on the surface NRCS measured is performed by the Tropical Rainfall Measurement Mission (TRMM) satellite in 2011. The results manifest the relations between the statistical characteristics of the surface NRCS (such as mean and standard deviation) and incidence angles. The influence of NRCS statistical characteristics on the SPR system design is analyzed in the parts of system dynamic range, range side-lobes, antenna side-lobes and radar calibration. These analysis results are the foundations of the radar system requirement analysis and radar calibration method selection.