利用先验大气信息辅助解算VRS网络模糊度  

Improving Ambiguity Resolution for VRS Network Using Priori Atmospheric Data

作　　者：张锋[1] 郝金明[1] 肖凡 

机构地区：[1]信息工程大学测绘学院 [2]61365部队

出　　处：《测绘》2010年第2期51-54,共4页Surveying and Mapping

摘　　要：基于载波相位差分的网络RTK技术能够提供厘米级实时定位,但首先必须正确确定参考站间模糊度,并建立流动站误差改正模型。基于数天的历史观测数据获得的先验大气信息,本文提出了一种改进的VRS参考站间模糊度解算方法。本方法主要是利用大气误差的时间相关性,提取先验大气信息,对当前GPS观测值的大气误差进行改正,然后再确定模糊度。初步的试验结果表明该方法能提高参考站网络间模糊度解算效率。The objective of network RTK based on differential carder phase is to provide centimeter-level real-time positioning accuracy. The success of using network RTK system, however, lies in the correct ambiguity resolution between reference stations and the error modeling at mobile stations. In this paper, a new algorithm of reference stations network ambiguity resolution has been proposed with an improved performance through incorporating priori atmospheric data. The focus of the new method is to eliminate atmospheric errors of current GPS observations, taking into account of the day-to-day correlation of these error sources. The preliminary testing results have indicated that the proposed method does improve the reference stations network ambiguity resolution.

关 键 词：VRS 对流层延迟 电离层延迟 网络模糊度 

分 类 号：P228[天文地球—大地测量学与测量工程]