基于VLBI数据的深空探测器精密三向测速及应用

发布时间：2018-11-09 19:09

【摘要】：本文研究了深空探测器信号基于软件锁相环的三向多普勒测速技术及传播介质误差校正方法,完成了对中国VLBI网接收的嫦娥三号X波段测控主载波信号的三向多普勒测量,精度达到0.64mm/s.测量结果被成功用于嫦娥三号的联合定轨,距离与三向多普勒速度定轨后残差的均方差分别为0.41m与0.55mm/s.获得的星历与参考精密星历位置均方差为17m,速度均方差为17mm/s,在参考精密星历内符精度以内.该技术还被用于基于欧洲火星探测器MEX地面观测的行星际闪烁研究.在高、低太阳倾角下,测量的频率与相位与欧洲联合VLBI研究所的结果一致.测量结果明确反映出太阳风等离子物质对MEX测控信号频率与相位的影响.本方法将用于我国未来深空探测与无线电科学研究.
[Abstract]:In this paper, the three-direction Doppler velocimetry technique based on the software phase-locked loop and the error correction method of the propagation medium are studied. The three-direction Doppler measurement of the main carrier signal of Chang 'e-3-band measurement and control in the Chang 'e-3 band received by the Chinese VLBI network is completed. The precision is 0.64 mm / s. The measured results have been successfully applied to the joint orbit determination of Chang'e 3. The mean square deviation of the residual error after the orbit determination of the distance and the 3D Doppler velocity is 0.41m and 0.55mm / s, respectively. The mean deviation of the position of the ephemeris and the reference ephemeris is 17m, and the mean deviation of velocity is 17mm / s, which is within the precision of the reference precision ephemeris. This technique has also been used to study interplanetary scintillation based on MEX ground observations from the European Mars rover. The measured frequency and phase at high and low solar dip angles are in agreement with the results of the European Union VLBI Institute. The measured results clearly reflect the influence of solar-wind plasma on the frequency and phase of MEX measurement and control signal. This method will be used in the future deep space exploration and radio scientific research in China.
【作者单位】：中国科学院上海天文台;中国科学院射电天文重点实验室;上海市导航定位重点实验室;
【基金】：国家自然科学基金(编号:11373061,11573057,11303077) 上海市导航与定位重点实验室(编号:06DZ22101) 上海市优秀学术带头人项目(编号:14XD1404300) 上海市青年自然科学基金(编号:Y457171001) 探月工程资助
【分类号】：P171

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