基于GAMIT软件利用不同星历反演PWV的研究

Research on Inverting Calculate PWV Using Different Ephemeris Based on GAMIT

首先简单介绍了GAMIT软件,然后基于GAMIT利用最终精密星历和预报精密星历分别解算相同的测站数据,得到测站天顶方向的对流层总延迟,再通过SAASTAMOINEN模型计算干延迟,提取出湿延迟后,结合地面气象数据反演大气可降水量。通过比较2种星历反演结果得到,最终精密星历和预报精密星历在解算结果上精度相当,预报精密星历在实时的水汽监测中满足要求,能够为降水的预报、预警提供帮助。

At first,we introduced GAMIT simply.And then we used final ephemeris and ultra-rapid ephemeris to calculate the same stations date based on GAMIT,and obtained the zenith troposphere delay.We calculated the zenith dry delay with the SAASTAMOINEN model,extract the zenith wet delay and computed precipitable water vapor combined with meteorological parameter.Through the comparison of results by two ephemerises,we conclude that the accuracy of the results is consistent.The ultra-rapid ephemeris can meet the requirement of real-time monitoring water vapor and can provide help for rainfall and warning.