›› 2014, Vol. 34 ›› Issue (1): 78-83.doi: 10.3780/j.issn.1000-758X.2014.01.011

• 研究探讨 • 上一篇    

深空探测单向差分测距几何时延仿真及计算

黄逸丹1, 郑为民1,2, 马茂莉1   

  1. (1 中国科学院上海天文台,上海 200030) (2 中国科学院射电天文联合实验室,南京 210008)
  • 收稿日期:2013-04-03 修回日期:2013-08-19 出版日期:2014-02-25 发布日期:2014-02-25
  • 作者简介:黄逸丹, 1983年生,2007年获中国科学院上海天文台天体测量与天体力学专业硕士学位,工程师。研究方向为射电天文干涉技术及应用。
  • 基金资助:

    国家自然科学基金(11173052、11303077)、国家863计划(2012AA121603)、探月工程三期预研(TY3Q20110027)、上海市导航与定位重点实验室(13DZ2273300、Y224351002)资助项目

Differential One-way Ranging Geometric Delay Simulation andCalculation of Deep-space Exploration

HUANG Yi-dan, ZHENG Wei-min, MA Mao-li   

  1. (1. Shanghai Astronomical Observatory, Chinese Academy of Sciences,Shanghai 200030) (2. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences,Nanjing 210008)
  • Received:2013-04-03 Revised:2013-08-19 Online:2014-02-25 Published:2014-02-25

摘要: 本地相关处理方法对单向差分测距(DOR)时延模型精度的依赖远高于常规甚长基线干涉测量(VLBI)时延模型,时延模糊度消除的难度也较高,目前这一方法还未在中国深空探测工程中实现。文章研究了DOR几何时延的计算方法,采用仿真和实测两种方法进行正确性验证。利用仿真DOR几何时延以及DOR信号,采用本地相关方法,获得DOR时延观测量,与仿真实际时延差别小于0.2ps。使用“嫦娥二号”卫星的轨道数据分别计算了DOR几何时延和VLBI几何时延,并做了相应转换。DOR时延与VLBI时延经转化后,吻合在几十皮秒量级。文章验证了DOR时延计算方法的正确性,成果可用于未来月球、火星、金星等深空探测器的DOR射电干涉测量。

关键词: 单向差分测距, 几何时延, 本地相关处理, 甚长基线干涉测量, 深空探测

Abstract: The local correlation method requires more accurate DOR delay model,and the ambiguity is also more difficult to eliminate. This method has not been applied to Chinese deep space exploration yet. DOR geometric time delay algorithm was studied and validated by two ways. DOR geometric delay and DOR signals were simulated, and the local correlation method was used to get DOR delay measurement, which was different from the simulated true DOR delay in 0.2ps. CE-2 orbit data were also used to calculate VLBI geometric delay and DOR geometric delay. Transformation between the above two delays was demonstrated. The difference between VLBI delay transferred from DOR delay and the direct calculated VLBI  delay was under dozens of picosecond. The research results validate the exactitude of DOR geometric time delay algorithm and can be used in the Chinese Lunar, Mars and Venus deep-space exploration projects in the future.

Key words: Differential of one-way ranging, Geometric delay, Local correlation, Very long baseline interferometry, Deep-space exploration