地基GPS准实时反演三峡地区大气可降水量的研究

Ground-Based GPS Nearly Real-Time Inversion of Precipitable Water Vapor over Three Gorges Area

摘要: 探讨了利用地基GPS气象学原理反演大气可降水量(precipitable water vapor,PWV)及其变化的可行性。从理论上分析了在缺少地面气象资料时用模型估计气象元素对反演PWV的影响,分析了用IGS超快速星历代替IGS最终精密星历准实时计算PWV的可行性。利用三峡地区13个监测点连续48 h以上的跟踪数据联合国内的几个IGS站,使用GAMIT软件进行了数据处理。

Abstract: The feasibility of precipitable water vapor distribution and variation with ground-based GPS meteorology is discussed,the influence of meteorological measurements errors using interpolated surface meteorological data is analyzed when meteorological data is absent.The feasibility of computing PWV with IGS ephemerides is discussed.With 48 hours continuous GPS monitoring data of 13 points,the PWV time serials are extracted out.When processing the GPS data,the GAMIT software is used combined with some IGS stations in China.