大地测量与地球动力学2011，Vol.31Issue(2)：107-110,116,5.
基于PPP的对流层延迟估计方法及其影响因素分析
ESTIMATION OF ZENITH PATH DELAY BASED ON PPP AND ANALYSIS OF ITS INFLUENCE FACTOR
摘要
Abstract
The method of zenith path delay (ZPD) estimation based on precise point positioning (PPP) is introduced. Besides,the effect of various factors on ZPD estimation' s accuracy is analyzed from the view of mapping function selection, satellite cut-off elevation angle setting, the use of precise ephemeris and clock errors. Accordingly, relatively better mode and data processing strategy are determined. Large amount of experiments and analysis show that ZPD with relatively high accuracy can be obtained by use of both NMF and GMF, and the difference between them is little. Moreover, 5° - 10° in the cut-off elevation angle is more favorable to ZPD estimation. In addition, the ZPD calculated with rapid precise ephemeris and clock errors or with predicted precise ephemeris and rapid precise clock errors are of the similar accuracy as that derived from post precise ephemeris and clock errors. However, accuracy of ZPD obtained by adopting extrapolated ultra-rapid precise ephemeris and rapid clock errors slightly decreases but is still relatively high.关键词
GPS精密单点定位/天顶对流层延迟/大气可降水量/钟差/星历Key words
GPS/ precise point positioning /zenith path delay/ atmospheric precipitable water/ clock error/ ephemeris分类
天文与地球科学引用本文复制引用
鄢子平,吕翠仙,何锡扬,郭斐..基于PPP的对流层延迟估计方法及其影响因素分析[J].大地测量与地球动力学,2011,31(2):107-110,116,5.基金项目
国家自然科学基金(40874017) （40874017）
