摘要
2013年12月14日嫦娥三号成功软着陆,随后开展两器分离、两器互拍等任务.利用同波束VLBI(Very long baseline interferometry)技术同时观测着陆器和玉兔月球车发射的信号,解算出的二者之间的差分相时延能够反映月球车位置数厘米的微小变化.基于差分相时延监测月球车动作的高灵敏度,利用月球车移动时的差分相时延数据,求得月球车5次移动的速率,其平均值为0.056 m/s.利用差分相时延1阶多项式拟合后残差的频谱,分析了月球车移动过程中的抖动情况及与月面地形的关系.
On 2013 December 14, the Chang＇E-3 made a successful soft landing on the lunar surface, and then carried out the tasks of separating the lander and the rover, and taking the photos of each other. With the same beam VLBI （Very long baseline interferometry） technique to observe the signals transmitted by the lander and the rover simultaneously, the differential phase delay between them is calculated, which can reflect a minor change of the rover＇s position on a scale of a few centimeters. Based on the high sensitivity of differential phase delay, the rover＇s speeds during 5 movements are obtained with an average of 0.056 m/s. The relationship between the rover＇s shake in moving process, and lunar terrain is analyzed by using the spectrum of the residual of the differential phase delay after the first-order polynomial fitting.
出处
《天文学报》
CSCD
北大核心
2015年第4期353-361,共9页
Acta Astronomica Sinica
基金
国家自然科学基金项目(11273049
11473059)
上海市导航和定位重点实验室(3912DZ22733001)资助
关键词
月球
技术
干涉
其他诸多方面
方法
解析
Moon, techniques
interferometric, techniques
miscellaneous, methods analytical, methods
miscellaneous
