基于地基GPS可降水量反演  

Estimation of Tropospheric Precipitable Water Vapor Based on Gound-based GNSS

作　　者：刘杨 刘艳祯 王福菊 LIU Yang;LIU Yanzhen;WANG Fuju(College of Geomatics,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590

出　　处：《测绘与空间地理信息》2020年第12期147-150,153,共5页Geomatics & Spatial Information Technology

摘　　要：应用GPS技术来预计可降水量的方法相对来说精度较高,并且不受外界环境条件的制约,可以进行全天候的观测,观测时间短、作业效率高,因此,近些年来这种方法得以广泛的应用。由于对流层延迟和可降水量的相关性较强,因而能够通过测站GPS观测数据推算出对流层延迟,再由对流层延迟直接推算得到可降水量。本文针对澳大利亚卡拉萨的IGS站karr测站以及北京房山的IGS站bjfs测站的观测数据,分别利用3种气象模型对观测数据进行处理,得到天顶对流层延迟、天顶流体静力学延迟和天顶湿延迟,再由天顶湿延迟反演得到我们所需的可降水量[1]。The method of estimating precipitable water by using GPS technology is of high accuracy,and is not restricted by the external environment.This method can be widely used in recent years,because it can observe all day and has short observation time and high efficiency.Due to the strong correlation between tropospheric delay and precipitable water,we can use the GPS data to measure the tropospheric delay,and then calculate the precipitable water directly from the troposphere delay.This text will use the observations from karr station which is located in Australia and observations from bjfs station which is located in Beijing to get the zenith tropospheric delay(ZTD).Through baseline calculation,we can get zenith hydrostatic delay(ZHD)and zenith wet delay(ZWD)and then we can obtain the precipitable water vapor(PWV).

关 键 词：可降水量 GPS观测 对流层延迟 湿延迟 GPS技术 

分 类 号：P228.4[天文地球—大地测量学与测量工程]