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对数亿千米之外的火星探测器进行跟踪导航定位,是火星探测的关键技术之一。目前,我国深空网尚未建成,利用中国VLBI网对火星探测器“火星快车”的定位精度仅约0.1as,难以为火星探测器的精密定轨提供数据保障。提出以遥感影像进行火星探测器几何定位的全新技术方法,利用严密传感器成像几何模型,通过地面控制点在物方空间坐标系中的坐标与其对应像点在像方坐标系中坐标之间的几何关系,解算探测器空间位置。对美国奥德赛号(Odyssey)火星探测器进行定位试验,精度达到了2.93mas,为我国火星探测器定位提供了理论和技术支持。
Tracking and positioning the Mars rover beyond the hundreds of millions of kilometers is one of the key technologies of Mars exploration. At present, China’s deep space network has not yet been completed. The localization accuracy of the Mars probe Mars Express using the China VLBI network is only about 0.1as, which makes it difficult to provide data protection for the precision orbit determination of the Mars probe. This paper presents a new technique of using the remote sensing image to locate the position of the Mars rover. By using the geometry model of the tight sensor, the geometry of the ground control point in the space object coordinate system and the coordinates of the corresponding image point in the image coordinate system Relationship, Solve the detector space position. The positioning accuracy of the Odyssey Mars probe was 2.93mas, which provided theoretical and technical support for the localization of the Mars probe in China.