上海航天
上海航天
상해항천
AEROSPACE SHANGHAI
2012年
2期
7-12
,共6页
路瑞峰%高强%李科%陈筠力
路瑞峰%高彊%李科%陳筠力
로서봉%고강%리과%진균력
干涉合成孔径雷达%基线%测高精度%误差分析
榦涉閤成孔徑雷達%基線%測高精度%誤差分析
간섭합성공경뢰체%기선%측고정도%오차분석
Interferometric synthetic aperture radar%Baseline%Height accuracy%Error analysis
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。
建立瞭分佈式榦涉閤成孔徑雷達（InSAR）衛星的基線模型,給齣瞭部位脩正、全毬衛星定位繫統（GPS）授時、插值和配準等主要誤差源與基線誤差的關繫,在Matlab軟件中倣真分析瞭各誤差源對基線及測高精度的影響。結果錶明：GPS測量誤差對測高精度的影響嚴重;閤成孔徑雷達（SAR）及GPS天線相位中心相對安裝點的誤差對測高精度的影響較大;安裝及熱變形誤差對測高精度的影響較小;姿態測量誤差、配準誤差,以及GPS授時誤差對測高精度的影響可忽略。
건립료분포식간섭합성공경뢰체（InSAR）위성적기선모형,급출료부위수정、전구위성정위계통（GPS）수시、삽치화배준등주요오차원여기선오차적관계,재Matlab연건중방진분석료각오차원대기선급측고정도적영향。결과표명：GPS측량오차대측고정도적영향엄중;합성공경뢰체（SAR）급GPS천선상위중심상대안장점적오차대측고정도적영향교대;안장급열변형오차대측고정도적영향교소;자태측량오차、배준오차,이급GPS수시오차대측고정도적영향가홀략。
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.
