摘要
本文针对基于区域GPS网内插流动站对流层天顶延迟(ZTD)时存在的问题,提出了基于多项式拟合的移去恢复法。该方法利用对流层天顶延迟与高程之间的强相关性,通过多项式拟合将对流层天顶延迟中与高程相关的信息移去后再进行内插求解。采用SCIGN的GPS数据进行实验,结果表明:基于多项式拟合的移去恢复法的插值精度明显高于传统的反距离加权直接内插法,特别对于高程明显偏离参考站总体高程的流动站具有较好的改进效果。
In this paper, a new remove-restore method based on polynomial fitting was proposed, which is aimed at solving the problem of the interpolation method to calculate the tropospheric zenith delay of rover stations based on regional GPS network. The cor- relation analysis was done between the tropospheric zenith delay and elevation, and interpolation was done after the information related to elevation was removed from the tropospheric zenith delay by the method of polynomial fitting. An experiment was done in this paper with the GPS data of SCIGN, and the result showed that the interpolation precision of this method was significantly higher than the tra- ditional inverse distance weighted method, especially for those rover stations whose elevation deviate from the overall elevation of the reference stations significantly.
出处
《测绘科学》
CSCD
北大核心
2013年第4期52-54,共3页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41104006)
国家高技术研究发展计划(2009AA121401)
科研业务费(7771115)
关键词
对流层天顶延迟
区域GPS网
直接内插
移去恢复法
zenith tropospheric delay
regional GPS network
direct interpolation method
remove-restore method
