摘要
给出单基站北斗中长基线动态定位的数学模型和误差处理策略,基于中国天津、武汉和广东CORS站网的多条中长基线实测数据,对模糊度首次固定时间和定位精度进行评估与分析。结果表明,对于目前的北斗区域系统而言,北斗中长基线的首次固定时间与测站纬度和观测时段有明显的相关性,中国北方地区的平均首次固定时间约为2h,中部地区约为1.5h,南方地区不到1h,同一条基线不同时段的首次固定时间存在差异;模糊度正确固定后的动态解算精度RMS在东方向、北方向、高程方向分别为2.5cm、2.1cm和6.1cm。
We first present a mathematical model of medium-long baseline kinematic positioning based on BDS triple frequency observations.Several baselines from CORS in Tianjin,Wuhan and Guangdong are adopted to evaluate and analyze the TTFF and the accuracy of BDS medium-long baseline kinematic positioning.In terms of the present BDS constellation,the TTFF shows strong correlation with the latitude and observation period.The TTFF in the north of China is about 2 h,while it is about1.5 hto less than 1 hin the middle and south of China.With the right fixed ambiguity,the east and north accuracies of the baseline are 2.5 and 2.1 cm respectively,while the vertical accuracy is 6.1 cm.
作者
吴仁攀
刘万科
吴风波
李建龙
WU Renpan;LIU Wanke;WU Fengbo;LI Jianlong(School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China;Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University 129 Luoyu Road, Wuhan 430079, China;Airborne Remote Sensing and Mapping Institute of Inner Mongolia,42 South-Xing＇an Road, Hohhot 010051, Chin)
出处
《大地测量与地球动力学》
CSCD
北大核心
2018年第7期668-672,678,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(91638203)
长江科学院开放研究基金(CKWV2016381/KY)
湖北省自然科学杰出青年基金(2015CFA039)
测绘遥感信息工程国家重点实验室专项~~
