耿虎军
（中国电子科技集团公司第五十四研究所 石家庄 050081）

摘要：距离测量是地面测控站完成月球探测器定轨的一项重要功能。与地球卫星相比，月球探测器具有距离远、信号弱、传输时延大的特点，我国现有的测距体制是纯侧音测距，最低侧音为8Hz，无模糊距离为18750km，不能满足对月球探测器以及深空目标的测距需求。本文提出一种测距音和伪码复合的测距体制，该体制在地面测控站的测距过程中，可以快速完成距离捕获，进入距离测量阶段。而且，该体制的无模糊作用距离可以充分满足月球探测的需要。

关键词：月球探测器、距离测量、测距体制、无模糊距离

A ranging scheme which can get range data quickly used in lunar explorer navigation
Geng hujun
(The 54th Research Institute of CETC  Shijiazhuang 050081)

Abstact: Distance measurement is an important function of ground station in lunar explorer’s orbit location. Compared with earth satellite, lunar explorer is characterized with far distance, weak signal and long propagation delay. The ranging system that we are using is tone ranging, the lowest frequency of tone is 8 Hz, accordingly, the  unambiguous distance is 18750 kilometers , which don’t meet the requirement of  ranging lunar explorer and other deep space targets. We present a hybrid ranging scheme, which combines tone and PN code. By this scheme, we can get range data more quickly than traditional way, and it’s unambiguous distance meets the requirement of lunar explorer navigation.

Keywords:lunar explorer, distance measurement, ranging scheme, unambiguous distance

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