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考虑区域CORS网络对流层信息的改进PPP方法 被引量:2

Improved PPP resolution considering regional CORS based tropospheric information
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摘要 为了提高精密单点定位(PPP)的收敛速度,提出了一种利用CORS网络反演的区域对流层信息增强精密单点定位方法.该方法利用非差PPP模型,首先解算区域基准站的高精度ZTD信息,再通过基准站与流动站的位置关系建立空间回归模型,最后流动站用户基于模型得到的ZTD伪观测值实现精密单点定位,增强了解算的强壮性.实验结果表明,基准站估计ZTD精度优于1 cm,利用基准站数据建立的空间回归模型能够较好地模拟区域对流层延迟的空间关系;在该实验条件下,模型值用于约束流动站的PPP解算,使流动站定位结果收敛到优于10 cm精度的时间缩短了30%.改进的新方法能够有效克服传统精密单点定位方法需要较长时间收敛的缺陷,有助于PPP方法的工程实践应用. In order to speed up the convergence of precise point positioning (PPP), an improved method is proposed, which applies a priori tropospheric delay derived from existing continuously op- erating reference station (CORS). First, the precise zenith tropospheric delay (ZTD) of nearby sta-
出处 《东南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2013年第A02期370-374,共5页 Journal of Southeast University:Natural Science Edition
基金 中央高校基本科研业务费专项资金资助(CXZZ12_0112)
关键词 CORS PPP 对流层回归模型 增强 伪观测值 continuously operating reference station (CORS) precise point positioning (PPP) tropospheric regression model augmentation pseudo-observation
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