GPS非差精密解算软件PLAOD及其性能分析  

Undifferenced Precise GPS Processing Software PLAOD and Its Performance Analysis

作　　者：徐韶光[1] 熊永良[1] 张文皓 王德军 XU Shaoguang;XIONG Yongliang;ZHANG Wenhao;WANG Dejun(School of Geoscience and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;School of Civil and Environmental Engineering,The University of New South Wales,Sydney 2052,Australia;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]西南交通大学地球科学与环境工程环学院,四川成都611756 [2]新南威尔士大学土木与环境工程学院,新南威尔士悉尼2052 [3]河北工业大学土木与交通学院,天津300401

出　　处：《西南交通大学学报》2023年第1期159-166,共8页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(41274044);四川省科技计划(2021YFG0339)。

摘　　要：PLAOD(precise location and orbit determination)是西南交通大学自主研发的GPS非差精密定位定轨软件.该软件目前能够处理GPS观测数据,具有高精度定位、大气反演和低轨卫星轨道确定功能.本文在介绍PLAOD相关理论的基础之上对其性能进行了分析.利用多组GPS观测数据进行测试,通过与IGS(international GNSS service)等相关机构精密产品对比,PLAOD具备如下性能:静态定位精度可达毫米级;动态定位精度可达厘米级;静态对流层天顶延迟的估计精度通常优于1 cm,动态对流层天顶延迟的估计精度在2 cm以内;电离层天顶延迟估计结果与IGS的IONEX(ionosphere exchange)产品具有较高的吻合度;与JPL(jet propulsion laboratory)提供的简化动力学低轨卫星轨道相比,几何法确定轨道的准确度可达厘米级.PLAOD(precise location and orbit determination)is an undifferenced precise GPS data processing software for positioning and orbit determination fully developed by Southwest Jiaotong University.Currently,the software can process GPS observation data,and has the functions of precise positioning,atmospheric inversion and orbit determination for low earth obiter.Following the introduction to basic theory of PLAOD,its performance is focused.Multiple sets of GPS observation data were tested.Compared with the precise product provided by IGS(international GNSS service)and other institutes,PLAOD has shown following features.The static positioning accuracy can reach millimeter level,the kinematic positioning accuracy can reach centimeter level,the estimation precision of the tropospheric zenith delay in static mode is usually better than 1 cm,and the one in kinematic mode is better than 2 cm.There is a high consistence between the ionospheric zenith delay results from PLAOD and the IONEX(ionosphere exchange)product of IGS.In comparison with the reduced dynamic orbit of low earth orbiter provided by JPL(jet propulsion laboratory),the accuracy of orbit determined by geometry method is usually at the centimeter level.

关 键 词：PLAOD 精密单点定位 对流层天顶延迟 电离层天顶延迟 精密轨道确定 

分 类 号：P228[天文地球—大地测量学与测量工程]