›› 2012, Vol. 32 ›› Issue (3): 43-48.doi: 10.3780/j.issn.1000-758X.2012.03.007

• 研究探讨 • 上一篇    下一篇

短基线约束条件下的整周模糊度二维搜索算法

 庞春雷, 赵修斌, 卢艳娥, 严玉国, 余永林   

  1. (空军工程大学电讯工程学院,西安710077)
  • 收稿日期:2011-08-30 修回日期:2012-06-25 出版日期:2012-06-25 发布日期:2012-06-25
  • 作者简介:庞春雷 1986年生,2009年获空军工程大学电讯工程学院卫星导航专业硕士学位,现为空军工程大学电讯工程学院卫星导航专业博士研究生,主要研究方向为卫星导航的高精度定位定姿技术和组合导航。
  • 基金资助:

    国家自然科学基金(61071014),学院科学创新基金(DYCX1001)

 Planar Search Algorithm for GPS Ambiguity Resolution with Short Baseline Length Constraint

 PANG  Chun-Lei, ZHAO  Xiu-Bin, LU  Yan-E, YAN  Yu-Guo, YU  Yong-Lin   

  1. (College of Telecommunication Engineering, Air Force Engineering University, Xi′an 710077)
  • Received:2011-08-30 Revised:2012-06-25 Online:2012-06-25 Published:2012-06-25

摘要: 通过对基线仰角和方位角的搜索,在二次残差最小的条件下确定整周模糊度。建立了搜索模型,论述了搜索原理及其应用的具体过程,推导了粗搜索和精搜索的步长。通过试验与最小二乘降相关平差(Least-squares Ambiguity Decorrelation Adjustment,LAMBDA)算法进行分析比较,验证了新方法的正确性及可靠性,得到了1 cm的基线精度,0.6°的仰角和0.4°的方位角精度,且算法简单,搜索效率高,适用于载体的姿态测量。

关键词:  短基线约束, 二维搜索, 整周模糊度, 姿态测量, 航天器

Abstract: A new planar search method for GPS ambiguity resolution with short baseline length constraints was proposed. The integer ambiguity was fixed in the condition of least square error by searching the baseline elevation and azimuth angle. The model was established, the search principle and application process of the new algorithm were discussed, and the step of extensive search and intensive search was induced. Through the experiments and comparing with LAMBDA algorithm, the new method with simple algorithm and high efficiency was proved. The error is no more than 1cm in baseline precision, no more than 0.6° in elevation precision and no more than 0.4° in azimuth precision. This method is also adaptive to attitude measurement.

Key words: Short baseline confinement, Two dimensional searching, Integer ambiguity, Attitude measurement, Spacecraft