CAJ | 학술논문

针对我国后续深空探测任务中高精度相对定位需求，提出了采用天文同波束相位参考成图技术进行深空探测器相对定位的方法。首先建立适用于深空探测器信号特点的同波束相位参考成图相对定位模型，然后分析信号带宽和 UV 覆盖两个因素对测量精度的影响。最后利用我国 VLBI 观测网(CVN)在2013年15、20和21日接收的嫦娥三号着陆器和玉兔号巡视器下行同波束数据，处理得到了巡视器在5个环拍点相对着陆器的位置，验证了本文方法的可行性及其对探测器下行信号的强适应性。与视觉定位结果的对比表明，巡视器相对着陆器定位精度达到米级。
침대아국후속심공탐측임무중고정도상대정위수구，제출료채용천문동파속상위삼고성도기술진행심공탐측기상대정위적방법。수선건립괄용우심공탐측기신호특점적동파속상위삼고성도상대정위모형，연후분석신호대관화 UV 복개량개인소대측량정도적영향。최후이용아국 VLBI 관측망(CVN)재2013년15、20화21일접수적항아삼호착륙기화옥토호순시기하행동파속수거，처리득도료순시기재5개배박점상대착륙기적위치，험증료본문방법적가행성급기대탐측기하행신호적강괄응성。여시각정위결과적대비표명，순시기상대착륙기정위정도체도미급。
To meet the needs of high accuracy relative position determination in deep space explorations, a new method is proposed based on the same beam phase-referencing imaging technique that originates from the radio astronomy.Fi rstly,the same beam phase-referencing imaging measurement model for spacecraft positioning is bui lt.The very long basel ine interferometry (VLBI)imaging principle and the phase difference between two spacecrafts are derived.Then,two precision affecting factors are analyzed, including the signal bandwidth and the UV coverage.The di rty beams formed by different station numbers and different observation lengths with the Chinese interferometry network are simulated.Final ly,with the same beam observation data of the Chang’E-3 lander and rover from the Chinese VLBI network (CVN)on December 15,20 and 21,2013,the Yutu rover lunar surface positions are determined with accuracy of about 1 meter.The results show the feasibi l ity and high accuracy of this method,which is wel l-adapted to the spacecraft signals without special beacons.