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中文摘要：
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。
英文摘要：
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.
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