Assessment of the three representative empirical models for zenith tropospheric delay(ZTD)using the CMONOC data

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国家科技期刊平台
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外文摘要：The precise correction of atmospheric zenith tropospheric delay(ZTD)is significant for the Global Navigation Satellite System(GNSS)performance regarding positioning accuracy and convergence time.In the past decades,many empirical ZTD models based on whether the gridded or scattered ZTD products have been proposed and widely used in the GNSS positioning applications.But there is no comprehensive evaluation of these models for the whole China region,which features complicated topography and climate.In this study,we completely assess the typical empirical models,the IGGtropSH model(gridded,non-meteorology),the SHAtropE model(scattered,non-meteorology),and the GPT3 model(gridded,meteorology)using the Crustal Movement Observation Network of China(CMONOC)network.In general,the results show that the three models share consistent per-formance with RMSE/bias of 37.45/1.63,37.13/2.20,and 38.27/1.34 mm for the GPT3,SHAtropE and IGGtropSH model,respectively.However,the models had a distinct performance regarding geographical distribution,elevation,seasonal variations,and daily variation.In the southeastern re-gion of China,RMSE values are around 50 mm,which are much higher than that in the western region,approximately 20 mm.The SHAtropE model exhibits better performance for areas with large variations in elevation.The GPT3 model and the IGGtropSH model are more stable across different months,and the SHAtropE model based on the GNSS data exhibits superior performance across various UTC epochs.

作者：

Debao Yuan、Jian Li、Yifan Yao、Fei Yang、Yingying Wang、Ran Chen、Tairan Xu

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作者单位：

College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing,100083,China

Hubei Luojia Laboratory,Wuhan,430079,China

基金：

National Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaOpen Fund of Hubei Luojia LaboratoryOpen Fund of State Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan UniversityFundamental Research Funds for the Central UniversitiesChina University of Mining and Technology-Beijing Innovation Training Program for College StudentsChina University of Mining and Technology-Beijing Innovation Training Program for College Students

项目编号：

42204022521741605227416923010003123P022023ZKPYDC10202302014202202023

出版年：

2024

DOI：

10.1016/j.geog.2024.01.006

参考文献

引证文献

大地测量与地球动力学(英文版)

影响因子：0.568

ISSN：1674-9847

年,卷(期)：2024.15(5)

Debao Yuan,Jian Li,Yifan Yao,et al.Assessment of the three representative empirical models for zenith tropospheric delay(ZTD)using the CMONOC data[J].大地测量与地球动力学(英文版),2024,15(5):488-494.DOI:10.1016/j.geog.2024.01.006.