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火星车的位置测定具有重要的工程意义和科学意义.本文针对火星车和轨道器的实际搭载能力,提出了利用轨道器的测距数据,以及火星车和轨道器的同波束VLBI观测数据开展火星车高精度测定位和轨道器测定轨的方法,给出了火星车和轨道器同波束VLBI差分相时延解算方法并分析了其测量误差.火星车和轨道器的联合定轨定位的仿真分析结果表明,利用弧段数小时的轨道器测距,以及火星车和轨道器的同波束VLBI差分相时延数据,有望实现误差数百米的火星车定位和误差数十米的轨道器定轨.这些研究成果对今后的火星探测工程有重要的应用价值.
Rover position measurement has important engineering significance and scientific significance.This paper aims at the actual carrying capacity of rover and orbiter, proposes the use of orbiter’s ranging data, as well as the rover and orbiter with the same beam VLBI observation data to carry out Mars Vehicle high precision measuring track and orbiter measuring track, the resolving method of differential phase delay of same-beam VLBI of rover and orbiter is given and its measurement error is analyzed. The simulation of joint orbit positioning of rover and orbiter The analysis results show that it is expected to realize the rover position error of several hundred meters and the orbiter trajectory with the error of tens of meters by using the orbiter ranging of several hours of arcs and the delay data of the same-beam VLBI differential phase of the rover and orbiter. These research results have important application value to Mars exploration project in the future.