基于GAMP的唐山曹妃甸区对流层天顶延迟模型

GAMP-Based Tropospheric Zenith Delay Model in Caofeidian Area of Tangshan

为了解决传统的对流层改正模型难以满足GNSS高精度测量要求的问题,根据2019年唐山市曹妃甸区探空数据建立了一种利用气象参数计算对流层延迟误差的关系表达式,并建立了适用于唐山曹妃甸地区四季的区域对流层天顶延迟模型。采用GAMP软件,将CFDQ模型与Saastamoinen、Estimate ZTD模型进行比较分析。研究结果表明:CFDQ模型适合于唐山曹妃甸地区的对流层大气描述,平面最优外符合精度为1.22 cm,高程最优外符合精度为2.25 cm,最优内符合精度为0.01 cm。此模型在曹妃甸地区相关的实验过程中,延迟误差修正的准确度有更显著的优势。

In order to solve the problem that the traditional tropospheric correction model is difficult to meet the requirements of high-precision measurement of GNSS area,the relational expression of calculating the troposphere delay error by using meteorological parameters was established according to the exploration data of Caofeidian Disctrict of Tangshan in 2019,and the regional tropospheric zenith delay model suitable for the four seasons in Caofeidian Disctrict of Tangshan was established.The saastamoinen and estimate ZTD models were compared with CFDQ model by using GAMP software.The results show that the CFDQ model is suitable for the tropospheric atmosphere description in Caofeidian area,with the optimal accuracy of 1.22 cm,the optimal elevation accuracy of 2.25 cm,and the optimal internal accuracy of 0.01 cm.The accuracy of delay error correction in Caofeidian.