基于影像信息的火星表面非合作目标定位分析

Precision Analysis on Non-cooperative Target Location of Mars Surface Based on Camera Image Data

火星遥感探测任务中,火星表面原始非合作目标(即:火星原生态表面目标)定位信息的获取对于科学研究的开展及工程的实施具有重要意义,是火星遥感探测信息应用的重要内容之一。针对定位信息的误差建模分析将对提高火星表面非合作目标的定位精度提供关键指导。文章以火星探测器所搭载的光学轨道相机为影像信息获取手段,在所获取的影像数据基础上,分析并建模讨论了火星表面非合作目标定位信息的各影响误差项,涉及影像像元分辨率、探测器定位信息、探测器姿态信息、影像时统信息、火星表面高程信息及相机安装布局信息等,并结合实际算例,给出了提高目标定位精度的分析建议。作为创新点之一,文章以火星探测为背景,通过火星探测器与地面测控站间通信链路方式,完成了以影像信息为基础的定位误差分析完备性表述,该分析结果可为后续行星及小天体遥感成像探测的优化应用提供一定的参考。

In the mission of Mars remote sensing exploration,acquisition of original non-cooperative target location information on Mars surface is significantly important for science research and engineering implementation,it is also one of the key items of application on remote sensing information from Mars.Precision analysis aimed at location information will provide key instruction to enhance location precision of non-cooperative target on Mars surface.In this paper,the orbit camera loaded by Mars probe is treated as the means for image information acquisition.Based on the acquired image data,each of error items on Mars surface non-cooperative target is modeled and discussed,including image pixel resolution,probe location,probe attitude,image time unification,Mars surface elevation,assembly layout,and some other information.An actual calculation case to provide analysis proposal for the enhancement about location accuracy of Mars surface target is shown in this paper.As one of the innovation point,this paper fulfilled the completeness statement of location precision analysis based on the image information by the usage of probe-earth circle with the background of Mars exploration.The analysis outcome can provide some engineering instruction for the optimizing application of subsequent remote-sensing and imaging detection on planet and small body.