GPT3模型估计对流层产品精度检验与分析

利用全球范围内224个IGS测站2019年的高精度对流层产品，对GPT3模型估计的天顶对流层延迟和大气水平梯度信息进行精度检验和分析。结果表明，精度在空间和时间分布上存在差异性，天顶对流层延迟、南北和东西方向大气水平梯度的平均偏差和均方根误差分别为0.12 mm/37.2 mm、-0.05 mm/0.49 mm、0.08 mm/0.57 mm。

Accuracy Test and Analysis on the Tropospheric Products Derived from GPT3 Model

We use the tropospheric products of 224 IGS sites with high-precision around the world in 2019 to validate and analyze the accuracy of the zenith tropospheric delay and atmospheric horizontal gradients information estimated by the GPT3 model. The results show that differences appear in spatial and temporal distribution, and the mean bias and root mean square error of zenith tropospheric delay, horizontal gradient in south-north and west-east direction are 0.12 mm/37.2 mm, -0.05 mm/0.49 mm and 0.08 mm/0.57 mm, respectively.