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Research on correlation of observation station in inverting of precipitable water vapor based on ground-based GPS
Author(s): 
Pages: 85-88
Year: Issue:  6
Journal: Electronic Measurement Technology

Keyword:  ground-based GPSLANsoftware GAMITIGS reference stationprecipitable water vapor;
Abstract: 地基GPS反演可降水量的基本原理是通过监测观测站上空天顶方向水汽总量,将观测中的“观测噪声”转变为需要的大气参数,而地基GPS局域网中相近测站的卫星高度角几乎相同,受到的大气延迟量则几近相同,因此局域网中的相邻测站上空的天顶延迟量有很强的相关性,而利用GAMIT等软件解算出的大气可降水量虽能消除相关性,却会呈现一定的系统偏差,为了获得测站上空的绝对大气可降水量,通过引入网外长基线IGS参考站的方法消除系统偏差,并得出结论只要引入2~3个网外IGS参考站就可确保测站的绝对可降水量精度.
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