摘要
对流层延迟是影响全球卫星导航系统(GNSS)定位精度的一类重要误差源。针对在雨雪天气下,对流层延迟改正模型精度分析不足的问题,利用全球定位系统(GPS)及北斗卫星导航系统(BDS)对南京地区雨雪天进行精密单点定位(PPP)实验,比较5种常用对流层延迟改正模型精度。实验结果表明:(1)不同对流层延迟改正模型解算的坐标精度在天顶方向上具有一定差异;(2)新不伦瑞克大学三代(UNB3m)模型较适用于南京地区冬日雨雪天气,欧洲静地轨道卫星导航重叠服务(EGNOS)及UNB3模型次之;全球气温气压湿度二代(GPT2)与萨斯塔莫宁(Saastamoinen)组合模型在非雨雪天(常规天气下)较适用,GPT2w与Saastamoinen组合模型次之。
Tropospheric delay is an important error source that affects the positioning accuracy of Global Navigation Satellite System(GNSS). In this paper, aiming at the problem that the accuracy analysis of tropospheric delay correction models in rain and snow weather is not in-depth, Global Positioning System(GPS) and BeiDou navigation satellite System(BDS) were used to carry out Precision Point Positioning(PPP) experiments on rainy and snowy days in Nanjing. The accuracy of five tropospheric delay correction models were compared. The experimental results showed that:(1) the coordinate accuracy of different tropospheric delay correction models was different in U direction;(2) in rainy and snowy weather in Nanjing, University of New Brunswick(UNB 3m) model had higher accuracy, followed by European Geostationary Navigation Overlay Service(EGNOS) and UNB3 models. The Global Pressure/Temperature(GPT2) and Saastamoinen combined model was more suitable for normal weather, followed by GPT2w and Saastamoinen combined model.
作者
李媛
章浙涛
何秀凤
徐天扬
袁海军
LI Yuan;ZHANG Zhetao;HE Xiufeng;XU Tianyang;YUAN Haijun(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)
出处
《导航定位学报》
CSCD
2022年第2期119-125,共7页
Journal of Navigation and Positioning
基金
国家自然科学基金重点项目(41830110)
国家自然科学基金项目(42004014)
国家重点研究发展计划项目(2018YFC1503603)
江苏省自然科学基金青年基金项目(BK20200530)
中国博士后科学基金资助项目(2020M671324)
中央高校基本科研业务费专项资金资助项目(B210202109)
江苏省博士后科研资助计划项目(2020Z412)
大地测量与地球动力学国家重点实验室开放基金项目(SKLGED2020-3-8-E)
南京市留学人员科技创新项目。
关键词
全球卫星导航系统
精密单点定位
对流层延迟改正模型
雨雪天气
global navigation satellite system
precision point positioning
tropospheric delay correction models
rain and snow weather
