The basic principle and method of inversion atmospheric water vapor in the use of observation data from CORS system were systematically discussed, and the process of inversion atmospheric water vapor was analyzed. The Guangxi regional dry delay model and weighted average temperature model were established based on the sounding data. The tropospheric delay quantity along zenith direction was calculated with the observation data from Guangxi CORS station and domestic IGS station. After comparation of regional model and experience model, it was concluded that the regional model was available, the inversion of atmospheric water vapor and sounding water vapor were equal in precision. It showed the reliability of the model at last.%系统地论述了利用CORS系统观测数据反演大气水汽含量的基本原理和方法,分析其反演大气水汽含量过程.基于探空资料建立了广西区域干延迟的延迟模型和加权平均温度模型,利用广西地区CORS站及国内IGS站的观测数据进行解算得出天顶方向对流层延迟量.经过比较区域模型与经验模型得出区域模型具有可用性,且反演出的大气水汽含量与探空水汽含量精度相当,从而验证了区域模型具有可靠性.
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