李德仁, 王树根. CCD推扫成像方式下星载GPS对地定位的模拟试验研究[J]. 武汉大学学报 ( 信息科学版), 1994, 19(1): 15-21.
引用本文: 李德仁, 王树根. CCD推扫成像方式下星载GPS对地定位的模拟试验研究[J]. 武汉大学学报 ( 信息科学版), 1994, 19(1): 15-21.
Li Deren, Wang Shugea. Research on the Ground Positioning of Satellite Based GPS under CCD Pushroom Scanning Mode[J]. Geomatics and Information Science of Wuhan University, 1994, 19(1): 15-21.
Citation: Li Deren, Wang Shugea. Research on the Ground Positioning of Satellite Based GPS under CCD Pushroom Scanning Mode[J]. Geomatics and Information Science of Wuhan University, 1994, 19(1): 15-21.

CCD推扫成像方式下星载GPS对地定位的模拟试验研究

Research on the Ground Positioning of Satellite Based GPS under CCD Pushroom Scanning Mode

  • 摘要: 从理论上分析了利用遥感信息对地动态定位精度问题。用模拟数据推算了CCD推扫成像方式下,星载GPS天线定位精度对定位的影响;并用同一组试验数据按三种方案(①只用地面控制点而无GPS观测值,②只用GPS观测值而无地面控制点,③GPS观测值加地面控制点)进行了对地定位精度的比较;同时考虑了GPS天线中心与CCD扫描中心间的转换以及GPS观测值所在地心直角坐标系与光束法平差所在局部切面坐标系之间的转换.

     

    Abstract: in this paper,we start from the theoretic accuracy analsis of CCD pushroom scannins mode,use the analogous data,to calculate the influence of satellite based GPS antenna positioning accuracy to the object positioning for ground. Using the same group of test data,the comparisions of ground point determination accuracy among following three cases are down, which includes:1)Only ground control points are used but no GPS observations; 2)Only GPS observations are used but no ground control points; 3)Both ground control points and GPS observations are used. Moreover, the transformation between the geocentrics coodinate system and the tangent plane coordinate system is considered,and also the transformation between the center of GPS antenna and of CCD scanner center. The obtained conclusions are useful for the study of remote sensing information position system for ground and of determing the observation method for satellite based GPS.

     

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