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- 2017
综合GPS和NCEP CFSv2的区域PWV估计方法
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Abstract:
利用地基GPS估计PWV（precipitable water vapor）时，除GPS观测数据外，GPS测站地表的气温和气压也是必要参数。针对我国多数GPS网并未配备相应的气象传感器的情况，利用美国环境预报中心气候预报系统第2版提供的逐6 h产品，并顾及测站高程转换时的平均海平面高改正，提出一种GPS测站气象参数的插值新方法。以香港卫星定位参考站网实测GPS数据进行试验研究，结果表明，平均海平面高对地表气压的插值结果影响较大，而对地表气温的插值结果影响较小；经平均海平面高改正后，地表气压插值结果的平均均方根误差（RMSE）为1.61 hPa，地表气温插值结果的平均RMSE为1.93 K；由插值气象参数估计的PWV的平均RMSE为2.76 mm，验证了所提方法的有效性
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