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北斗卫星导航系统的毫米级精度变形监测算法与实现 肖玉钢1, 姜卫平2
, 陈华1, 袁鹏2, 席瑞杰1
1. 武汉大学测绘学院， 湖北 武汉 430079;
2. 武汉大学卫星导航定位技术研究中心， 湖北 武汉 430079 收稿日期：2014-12-08；修回日期：2015-07-08
基金项目：国家863计划（2012AA12A209）；国家自然科学基金（41374033）。
第一作者简介：肖玉钢（1984—），男，博士生，研究方向为GNSS高精度定位定轨算法。
通信作者：姜卫平， wpjiang@whu.edu.cn
摘要：研究了北斗卫星导航系统（BeiDou Navigation Satellite System，BDS）毫米级精度变形监测算法。首先改进了TurboEdit方法，以能够探测到1周的小周跳；针对BDS星座结构给出更为高效的独立双差观测值搜索方法；对于模糊度固定，采用决策函数和序贯模糊度固定相结合的方法。在此基础上，研制了BDS变形监测软件。最后，利用变形监测试验平台的实测数据，从星座分布、解算精度等方面分析了BDS在变形监测中应用的可行性。结果表明，目前在试验区域内BDS与GPS在卫星几何分布等方面基本相当。BDS的短基线解算精度略低于GPS，但仍可达到平面1 mm以内、高程2 mm以内的精度水平。
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关键词： 北斗卫星导航系统 变形监测 软件实现 精度分析
Research and Realization of Deformation Monitoring Algorithm with Millimeter Level Precision Based on BeiDou Navigation Satellite System
XIAO Yugang1, JIANG Weiping2 , CHEN Hua1, YUAN Peng2, XI Ruijie1
Abstract: The deformation monitoring algorithm with millimeter level precision based on BeiDou Navigation Satellite System (BDS) was researched. The TurboEdit method was improved to detect small cycle slips, e.g. 1 cycle. Focusing on BDS constellation, a more efficient algorithm used to construct double-differenced observations was developed. The Bootstrap+Decision function method was utilized to improve the probability of biases fixing. Based on the improved algorithm above, a deformation monitoring software based on BDS was achieved. Afterwards, the availability of BDS in the field of deformation monitoring was analyzed in terms of satellites distribution and precision and accuracy of solutions, utilizing the observations acquired from the experimental platform. The conclusion was drawn that
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currently BDS is similar to GPS in terms of satellites distribution in the test area. The precision of short baselines derived from BDS is better than 1 mm for the horizontal components, better than 2 mm for the vertical components, which is still a little lower than GPS. Key words: BeiDou Navigation Satellite System deformation monitoring software achievement precision analysis
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