摘要
建立了分布式干涉合成孔径雷达(InSAR)卫星的基线模型,给出了部位修正、全球卫星定位系统(GPS)授时、插值和配准等主要误差源与基线误差的关系,在Matlab软件中仿真分析了各误差源对基线及测高精度的影响。结果表明:GPS测量误差对测高精度的影响严重;合成孔径雷达(SAR)及GPS天线相位中心相对安装点的误差对测高精度的影响较大;安装及热变形误差对测高精度的影响较小;姿态测量误差、配准误差,以及GPS授时误差对测高精度的影响可忽略。
The mathematical model of the baseline for the distributed satellite interferometeric synthetic aperture radar（SAR） was established in this paper.The relationships among the baseline error and main error sources such as position modification,GPS time service,and interpolation and registration were given out.The influence of each error source on the baseline and height accuracy were analyzed using Matlab software.The results showed that the effect of the GPS measurement error on the elevation resolution was serious,the influence of the antenna phase center＇s instability error of SAR and GPS on the elevation resolution was great,the effects of the installation error and thermo distortion were rather small,and the influences of attitude error,registration error and GPS time service error on the elevation resolution could be ignored.
出处
《上海航天》
2012年第2期7-12,共6页
Aerospace Shanghai
关键词
干涉合成孔径雷达
基线
测高精度
误差分析
Interferometric synthetic aperture radar
Baseline
Height accuracy
Error analysis
