对流层映射函数对低纬度城市GNSS网的影响  

The Influence of Tropospheric Mapping Function on GNSS Networks in Low Latitude Cities

作　　者：陈国恒 周建营[1] 吴宗泽 Chen Guoheng;Zhou Jianying;Wu Zongze(Surveying and Mapping Insitute Lands and Resource Department of Guangdong Province,Guangzhou 510500,China;Guangdong Provincial Cartographic Institute,Guangzhou 510095,China)

机构地区：[1]广东省国土资源测绘院,广东广州510500 [2]广东省地图院,广东广州510095

出　　处：《城市勘测》2020年第4期111-116,共6页Urban Geotechnical Investigation & Surveying

摘　　要：针对低纬度沿海城市GNSS网的地域性特征,以粤港澳大湾区江门市为例,利用GAMIT/GLOBK软件选择全球常用的对流层映射函数GMF、NMF、VMF1,分别在不同卫星高度角下进行基线解算和平差计算,以分析其带来的影响。结果发现,选择卫星高度角为10°~15°时,基线解算和平差计算结果精度更高;当在10°的卫星高度角下,选择VMF1略优于GMF和NMF,当在15°的卫星高度角下,选择NMF略优于GMF和VMF1。Aiming at the regional characteristics of GNSS network in low-latitude coastal cities,taking Jiangmen city in the greater bay area of Guangdong,Hong Kong and Macao as an example,GAMIT/GLOBK software was used to select global commonly tropospheric mapping functions GMF,NMF and VMF1,and to conduct baseline calculation and differential calculation at different satellite altitude angles,respectively,so as to analyze its impact.The results show that the accuracy of baseline calculation and differential calculation is better when the altitude angle of the satellite is 10°~15°.At a satellite altitude angle of 10°,VMF1 is slightly better than GMF and NMF,and at a satellite altitude angle of 15°,NMF is slightly better than GMF and VMF1.

关 键 词：低纬度 对流层映射函数 基线解算 平差计算 卫星高度角 

分 类 号：P228[天文地球—大地测量学与测量工程]