GPT系列模型在HKCORS中的适用性分析  

Analyzing the application of GPT series model in HKCORS

作　　者：林栋德 杨世超 Lin Dongde;Yang Shichao(Xining Land Survey and Planning Research Institute Co.,Ltd.,Xining 810000,China)

机构地区：[1]西宁市国土勘测规划研究院有限公司,西宁810000

出　　处：《工程勘察》2023年第11期59-62,共4页Geotechnical Investigation & Surveying

基　　金：西宁市科技计划项目(基金号:2019-Y-12).

摘　　要：由于对流层延迟是影响导航定位误差重要原因之一,基于GAMIT/GLOBK软件对GPT系列模型在香港地区连续运行参考站(HKCORS)数据中的适用性进行分析,结果表明,GPT3模型精度最佳,GPT2w模型和GPT2模型精度次之,GPT模型精度较差。GPT3模型在香港地区得到气温、气压和水气压与实测气象数据最为接近,此时GPT3模型气温平均BIAS值和RMS值分别为1.93℃、2.04℃,GPT3模型气压平均BIAS值和RMS值分别是2.89hPa、3.54hPa,GPT3模型水气压平均BIAS值和RMS值分别是1.57hPa、2.38hPa,同时GPT3模型反演香港PWV精度最高,精度优于3.25mm。As tropospheric delay is one of the important reasons affecting navigation and positioning error,the applicability of GPT series models in data processing of Hong Kong continuously operating reference stations(HKCORS)is analyzed based on GAMIT/GLOBK software.The results show that the accuracy of GPT3 model is the best,GPT2w model and GPT2 model are the second,and the accuracy of GPT model is poor.The temperature,air pressure and water pressure obtained by GPT3 model in Hong Kong are the closest to the measured meteorological data.At this time,the average temporature BIAS and RMS value of GPT3 model are 1.93℃and 2.04℃respectively,the average atmospheric pressure BIAS and RMS value of GPT3 model are 2.89hPa and 3.54hPa respectively,and the average water pressure BIAS and RMS value of GPT3 model are 1.57hPa and 2.38hPa respectively.At the same time,GPT3 model has the highest accuracy in retrieving PWV in Hong Kong,Its accuracy is better than 3.25mm.

关 键 词：香港地区连续运行参考站 对流层 大气可降水量 GPT GAMIT/GLOBK 

分 类 号：P228[天文地球—大地测量学与测量工程]