基于部分模糊度固定的GNSS高精度定位方法及地灾监测应用OA
GNSS high-precision positioning method based on partial ambiguity fixing and its application in ground disaster monitoring
针对GNSS在地质灾害监测过程中容易受到外界环境干扰、观测值质量较低的问题,采用依据卫星高度角选择模糊度子集的方式实现部分模糊度固定(partial ambiguity resolution,PAR)算法,使用快速静态模式对地灾监测数据进行处理,并与全模糊度固定(full ambiguity resolution,FAR)算法对比,从不同时长解算的时效性、模糊度固定率、Ratio等方面进行分析.结果表明,部分模糊度固定能有效改善固定率,提高Ratio值.两种固定策略的解算结果在精度上十分接近,并在水平方向精度都优于 5 mm,垂直方向精度优于 10 mm.部分模糊度固定能有效提高GNSS技术在地质灾害监测领域的可用性.
Aiming at the problem that the global navigation satellite system(GNSS)is easily disturbed by the external environment in the process of geological disaster monitoring and the quality of the observation value is low,the partial ambiguity resolution algorithm is realized by selecting the ambiguity subset according to the satellite elevation angle.The fast static mode is used to process the geological disaster monitoring data,and compared with the full ambiguity resolution algorithm,the timeliness,ambiguity resolution rate,Ratio and other aspects of different time resolution are analyzed.The results show that partial ambiguity fixing can effectively improve the fixing rate and the Ratio value.The results of the two fixed strategies are very close in accuracy,and the accuracy in the horizontal direction is better than 5 mm,and the accuracy in the vertical direction is better than 10 mm.Partial ambiguity resolution can effectively improve the availability of GNSS technology in the field of geological disaster monitoring.
李鹏程;师芸;束远明;董伟龙;周翱
西安科技大学测绘科学与技术学院,西安 710054西安科技大学测绘科学与技术学院,西安 710054中国海洋大学海洋地球科学学院,山东青岛 266100西安捷达测控有限公司,西安 710100西安科技大学测绘科学与技术学院,西安 710054
测绘与仪器
GNSS部分模糊度固定定位精度时效性地灾监测
GNSSpartial ambiguity fixingpositioning accuracytimelinessdisaster monitoring
《全球定位系统》 2024 (6)
84-88,5
国家自然科学基金资助项目(42174045)国家自然科学基金资助项目(41874012)
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