基于CORS网对流层信息的精密单点定位  

PRECISE POINT POSITIONING BASED ON TROPOSPHERIC REFRACTION CORS

作　　者：聂建亮[1] 张双成[1] 王月莉[2] 张玉芳[2] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]国家测绘局第一航测遥感院,西安710054

出　　处：《大地测量与地球动力学》2010年第2期91-94,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40774001)

摘　　要：利用现有对流层延迟模型进行GPS观测改正往往难以满足高精度定位需要。讨论基于区域CORS网提供的对流层信息内插得到GPS测站天顶延迟改正的方法。该方法利用CORS网提供的高精度对流层折射信息,通过格网点建模得到测站的天顶延迟,提高了对流层延迟的精度。以武汉IGS站的实测数据进行验证,结果表明基于区域CORS网信息的精密单点定位的天顶方向精度优于常用对流层模型估计精度,且计算简单。The tropospheric refraction in the position of a GPS receiver is computed with fitting the tropospheric refraction of CORS, but the accuracy which is estimated with the available tropospheric model is low. The tropospheric refraction is gained by fitting its grids in CORS, so the accuracy can be improved. Taking the data of WUHN as an example, it is shown that the accuracy of U is better than that with estimating by tropospheric model, and is similar with the results of parameter estimation. This way is easy for the tropospheric refraction because it has been provided before computing the results of the GPS receiver.

关 键 词：精密单点定位 CORS 对流层延迟 天顶延迟 参数估计 

分 类 号：P227[天文地球—大地测量学与测量工程]