华北地区地基GPS水汽反演中加权平均温度模型研究

Weighted Mean Temperature Models for Mapping Zenith Wet Delays onto Precipitable Water in North China

运用几种不同的加权平均温度的算法,计算了华北地区张家口、北京和邢台的加权平均温度。结果表明,对于华北地区而言,常规的计算模型普遍存在一定的系统误差。在对加权平均温度与地面各气象要素的关系分析基础上,分别建立了华北地区基于地面气象要素的单因子和多因子回归方程,较好地满足了GPS遥感水汽总量实时性和高精度的要求。

Weighted mean temperatures （WMT） of Zhangjiakou, Beijing and Xingtai are calculated by using different methods. Results indicate that there are some systematic errors in the WMTs of North China obtained using the common calculation methods. Based on the relationship between the WMT and local surface meteorological elements, single factor and multi-factor regression equations for WMT are developed, and these local regression equations are able to satisfy the requirements of real time use and high accuracy for the retrieval of precipitable water from ground-based GPS remote sensing data.