在线PPP服务系统对钟跳的处理能力分析

对比分析了CSRS-PPP、APPS、GAPS、magicGNSS 4款在线PPP服务系统对钟跳数据的处理能力。结果表明,CSRS-PPP的稳健性最好,能够有效处理三类ms级钟跳的数据;APPS能够有效解决第一类ms级钟跳对定位的不利影响,但其对第二类ms级钟跳缺乏必要的控制;GAPS则完全没有顾及钟跳的影响,当发生第一、二类钟跳时,定位结果反复重新初始化,严重影响了PPP的定位精度;magicGNSS的稳健性最差,即便是对于许多不存在钟跳的数据,其定位结果也相对较差,甚至经常出现解算失败的现象。此外,还对计划升级为在线PPP服务系统的TriP 3.0的钟跳处理能力进行了简要分析,结果表明,该软件能够有效处理各类钟跳数据,定位精度较高。

Processing Capacity for GPS Data with Clock Slip Using Online PPP Services

The processing capacity for GPS data with clock jumps using four online PPP services(CSRS-PPP,APPS,GAPS,and magicGNSS) are analyzed.The experimental results show that,CSRS-PPP is the most robust service which can effectively deal with the millisecond-level(ms) jumps and avoid the effects on positioning.However it is incapable of the frequent microsecond-level(μs) jumps.APPS can effectively solve the adverse effects of first type ms jumps,but invalid for the second type of ms jumps.GAPS is totally invalid for the first two types of ms jumps for lack of necessary control,which leads to unnecessary re-initializations and unpredicted results.As to magicGNSS,even for the clean data without any clock jump,its positioning results are terrible,and the phenomenon of failure solution often appear.In addition,a brief test of the capacity for clock jumps with TriP 3.0 is presented.The results show that TriP can deal with all the types of clock jumps with a good performance.