基于区域CORS网天顶对流层延迟4D建模研究

摘要

利用区域CORS网参考站的天顶对流层信息建立了一种不需要气象数据,只与时间和位置有关的天顶对流层延迟新模型.通过广西CORS网实测数据,与反距离加权法和移去恢复法进行了对比分析,结果表明,新模型计算的天顶对流层值平均精度为8.5mm,尤其在下雨天,新模型计算的天顶对流层延迟精度比其他两种方法有显著提高.将新模型法应用于测站PWV值估计,其平均精度为1.5mm.%A new model is established for estimation of zenith tropospheric delays from regional CORS data which does not require any meteorological data and only related to the time and position of the station. By compared with the inverse distance weighting method and the remove and recovery method using measured data from Guangxi CORS, the results show a significant improvement on the calculated accuracy with new model, that the average accuracy is about 8.5mm, especially in the rainy day. Besides, the average accuracy of the new model used to estimate the surface PWV values of CORS station is about 1.5 mm.