摘要
针对不同对流层映射函数对全球导航卫星系统(GNSS)精密数据处理的影响,为获取适用于重庆市的对流层延迟解算策略,本文基于重庆市连续运行参考站(CORS)分析了不同季节条件下不同映射函数在不同高度角对精密解算的影响。结果表明:1)不同映射函数解算得到的基线重复性精度相当,且均表现出一致的季节性差异,即冬季、春季基线重复性优于夏季;2)不同映射函数在不同截止高度角(10°和15°)时未表现出明显的差异性;3)提高截止高度角后,维也纳映射函数(VMF1)、全球投影函数(GMF)和Neill映射函数(NMF)在高程方向上基线重复性降低(固定误差增加约1.5 mm),平面方向未表现出明显差异。
For the influence of different tropospheric mapping functions on GNSS precision data processing,the influence of different tropospheric mapping functions at different altitude angles in different seasons is analyzed using CORS stations in Chongqing in order to obtain a tropospheric delay solution strategy applicable to Chongqing.The results show that:a)The accuracy of baseline repeatability calculated by different mapping functions is equal,and all show consistent seasonal differences,that is,the baseline repeatability in winter and spring is better than that in summer.b)Different mapping functions do not show obvious differences at different cutoff height angles(10°and 15°).c)Increasing the cutoff height angle,the baseline repeatability of VMF1,GMF,and NMF mapping functions in the elevation direction decreases(the fixed error increases by about 1.5 mm),while there is no significant difference in the horizontal direction.
作者
刘邢巍
王斌
蒲德祥
蔡华
LIU Xingwei;WANG Bin;PU Dexiang;CAI Hua(Chongqing Geomatics and Remote Sensing Center,Chongqing 401127,China;Key Laboratory of Monitoring,Evaluation and Early Warning of Territorial Spatial Planning Implementation,Ministry of Natural Resources,Chongqing 401127,China)
出处
《测绘技术装备》
2023年第3期51-56,共6页
Geomatics Technology and Equipment
