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A Bias Correction Model of ZWD Based on RF_Adaboost Neural Network over China
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Xiangtian PENG1, Lulu ZHANG2, Maijin LIN1, Qingbing XU1, Junwen LIU1, Shaofeng XIE1, *
Journal of Geodesy and Geodynamics | 2025, 45(8) : 791 - 795
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Journal of Geodesy and Geodynamics | 2025, 45(8): 791-795
A Bias Correction Model of ZWD Based on RF_Adaboost Neural Network over China
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Xiangtian PENG1, Lulu ZHANG2, Maijin LIN1, Qingbing XU1, Junwen LIU1, Shaofeng XIE1, *
Affiliations
  • 1 College of Geomatics and Geoinformation, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, China
  • 2 College of Tourism and Landscape Architecture, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, China

    • PENG Xiangtian, postgraduate, majors in GNSS atmospheric sounding, E-mail:

About Author:

PENG Xiangtian, postgraduate, majors in GNSS atmospheric sounding, E-mail:

Published: 2025-08-15 doi: 10.14075/j.jgg.2024.08.401
Outline
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Previous ZWD models over China only consider the effects of elevation, latitude and meteorological parameters, without taking into account the impact of monsoon climate and ocean water vapor transport on ZWD estimation. To solve this problem, we take bias correction as the breakthrough point, analyze the spatial distribution of RMSE and bias of ERA5-ZWD estimation value obtained by the ERA5 data integration method and inversion method over China from 2016 to 2019. Then, the regional bias correction model over China based on RF_Adaboost neural network is established using the ERA5 and radiosonde data from 2016 to 2018. The results show that the bias of ERA5-ZWD estimation value in 2019 is significantly reduced after correction, and the RMSE is significantly reduced in the eastern coastal areas and southern regions of China.

ERA5  /  zenith wet delay  /  RF_Adaboost  /  bias correction
彭祥天, 张露露, 林买金, 徐庆兵, 刘俊文, 谢劭峰. 基于RF_Adaboost神经网络的中国区域ZWD偏差改正模型. 大地测量与地球动力学, 2025 , 45 (8) : 791 -795 . DOI: 10.14075/j.jgg.2024.08.401
Xiangtian PENG, Lulu ZHANG, Maijin LIN, Qingbing XU, Junwen LIU, Shaofeng XIE. A Bias Correction Model of ZWD Based on RF_Adaboost Neural Network over China[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (8) : 791 -795 . DOI: 10.14075/j.jgg.2024.08.401
Funding
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  • Guangxi Natural Science Foundation(2023GXNSFAA026434)
Appendix
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Year 2025 volume 45 Issue 8
25
10
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Article Info
doi: 10.14075/j.jgg.2024.08.401
  • Receive Date：2024-08-20
  • Online Date：2026-10-29
  • Published：2025-08-15
Article Data
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History
  • Received：2024-08-20
Funding
Guangxi Natural Science Foundation(2023GXNSFAA026434)
Affiliations
    1 College of Geomatics and Geoinformation, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, China
    2 College of Tourism and Landscape Architecture, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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