资源三号03星星载GPS精密定轨与精度评价

Precise orbit determination and accuracy evaluation based on GPS receiver for ZY3-3

针对资源三号03星精密轨道精度评定的问题,该文对资源三号03星星载GPS观测数据进行质量分析,采用简化动力学方法,实现了资源三号03星精密轨道确定,从重叠弧段分析内符合和激光测距检核外符合两个方面评估了资源三号03星精密轨道精度。结果表明,资源三号03星精密定轨内符合精度达到1 cm,外符合精度达到3 cm。精密轨道总体精度达到厘米级,可为资源三号03星遥感影像和激光测高几何精度提升提供高精度的卫星轨道信息。

Aiming at the problem of precision assessment of ZY3-3’s orbit, this paper carried out a quality analysis on the global positioning system(GPS) observation data of ZY3-3 satellite. Reduced-dynamic orbit determination method was adopted to realize the precise orbit determination of the ZY3-3.The precision orbit accuracy of the ZY3-3 was evaluated from the two aspects of overlapping orbit analysis(internal coincidence) and satellite laser ranging(SLR) verification(external coincidence). The results showed that the precision orbit determination of ZY3-3 had an internally coincident precision of 1 cm and an externally coincident precision of 3 cm. The overall precision of precise orbit determination reached the centimeter level, which could provide high-precision satellite orbit information for the remote sensing image of the ZY3-3 satellite and the improvement of accuracy of elevation measurement of laser altimeter.