深空探测学报
深空探測學報
심공탐측학보
Journal of Deep Space Exploration
2015年
3期
208-212
,共5页
高精度VLBI%同波束VLBI%深空探测%嫦娥3号
高精度VLBI%同波束VLBI%深空探測%嫦娥3號
고정도VLBI%동파속VLBI%심공탐측%항아3호
high precision VLBI%same beam VLBI%deep space exploration%Chang’e-3
介绍了适合单探测器测定轨的高精度 VLBI技术和适合多探测器测定位的同波束 VLBI 技术的研究进展。利用“嫦娥3号”着陆器的ΔDOR型VLBI观测，得到了误差0.67 ns的VLBI群时延数据。利用“嫦娥3号”着陆器和月球车的同波束 VLBI观测，得到了随机误差0.3 ps 的差分相时延数据，以数厘米的灵敏度监测出月球车的移动、转弯等动作，并把月球车的相对定位精度提高至1 m。针对深空探测，提出了使 VLBI 时延测量精度进一步提高所需要开展的部分研究内容。
介紹瞭適閤單探測器測定軌的高精度 VLBI技術和適閤多探測器測定位的同波束 VLBI 技術的研究進展。利用“嫦娥3號”著陸器的ΔDOR型VLBI觀測，得到瞭誤差0.67 ns的VLBI群時延數據。利用“嫦娥3號”著陸器和月毬車的同波束 VLBI觀測，得到瞭隨機誤差0.3 ps 的差分相時延數據，以數釐米的靈敏度鑑測齣月毬車的移動、轉彎等動作，併把月毬車的相對定位精度提高至1 m。針對深空探測，提齣瞭使 VLBI 時延測量精度進一步提高所需要開展的部分研究內容。
개소료괄합단탐측기측정궤적고정도 VLBI기술화괄합다탐측기측정위적동파속 VLBI 기술적연구진전。이용“항아3호”착륙기적ΔDOR형VLBI관측，득도료오차0.67 ns적VLBI군시연수거。이용“항아3호”착륙기화월구차적동파속 VLBI관측，득도료수궤오차0.3 ps 적차분상시연수거，이수전미적령민도감측출월구차적이동、전만등동작，병파월구차적상대정위정도제고지1 m。침대심공탐측，제출료사 VLBI 시연측량정도진일보제고소수요개전적부분연구내용。
This paper reports the research progress of high precision VLBI technology used for single-spacecraft orbit determination and same beam VLBI technique used for multi-spacecraft position determination.The ΔDOR VLBI residual delay after determining orbit of Chang’e-3 Lander is 0.67 ns,and the error of differential phase delay between the Lander and Yutu rover of Chang’e-3 is down to 0.3 ps.By using the differential phase delay data,the rover motions such as movement and turning as small as several centimeters are monitored,and the relative position between the rover and the Lander is precisely measured with an accuracy of 1 meter.For deep space exploration, further research works are put forward to improve the VLBI delay measurement accuracy.
