利用RTKLIB提取对流层延迟方法与精度评估

全球卫星导航系统可以进行精确的水汽估算，能够成功地应用于天气预报中，比如数值天气预报模型。利用精密单点定位技术提取天顶对流层延迟，采用 RTKLIB 开源软件进行静态精密单点定位解算并提取天顶对流层延迟估值，并与国际 GNSS 服务 IGS 提供的参考值进行比较，评估其对流层解算精度。选取中国 3 个 IGS 观测站数据进行试验，结果表明 RTKLIB 可以获得厘米级的对流层解算精度。

Retrieving of Tropospheric Delays from RTKLIB and Accuracy Evaluation

The accurate water vapor can be estimated by Global Navigation Satellite System, it also can be successfully applied to weather forecasts, such as numerical weather prediction models. The paper uses precise point positioning technology to retrieve the zenith tropospheric delay, retrieving the zenith tropospheric delay from the precise point positioning module in RTKLIB. Compares with the reference value provided by IGS to evaluate its accuracy of tropospheric resolution. The observation data of three IGS stations in China are selected for experiment, and the results show that RTKLIB can obtain the cm-level accuracy of the zenith tropospheric delay.