基于FJCORS资料探测大气可降水量的研究

Study on Retrieving Atmospheric Precipitable Water Vapor Based on FJCORS Data

本文采用超快速预报星历处理福建省连续运行卫星定位服务系统(FJCORS)资料得到大气可降水量(PWV),分别与同期采用最终精密星历和探空资料获得的PWV进行对比,结果表明:采用不同星历反演的PWV偏差在0.25 mm以内,并与探空结果具有较好的一致性,相关系数达到0.92,因此采用预报星历可以近实时反演PWV。对2015年"苏迪罗"台风登陆福建前后的PWV动态分析研究,表明PWV资料可以很好地监测水汽时空分布和变化,有助于分析强降雨天气的水汽传输过程,对预报强降水具有重要的指示作用。

This paper utilizes the ultra-rapid predicted ephemeris to process data of Fujian Continuously Operating Reference Station（FJCORS） to get the atmospheric Precipitable Water Vapor（PWV）.By comparing with the PWV obtained by using the final precise ephemeris and sounding observation data in the same period respectively,it＇s found that the deviations of PWV retrieved from using different ephemeris inversions are within 0.25 mm and have good consistency with sounding results,showing an evident positive correlation（R = 0.92）,which indicates that near-real-time PWV can be retrieved accurately from using ultra-rapid predicted ephemeris.The paper also analyzes the variations of PWV before and after typhoon Soudelor landing in Fujian in 2015,and indicates that the PWV data can be used to monitor the spatial and temporal distribution and variation of water vapor,it is helpful to analyze the water vapor transmission of strong rainfall weather.It is important for forecasting heavy rain.