Results 11 to 20 of about 329 (133)

Refining relative tropospheric delay modeling of GPT3 for large-height-difference RTK positioning

Frontiers in Astronomy and Space Sciences
Real-Time Kinematic (RTK) positioning technique, with centimeter-level accuracy, is widely used in landslide deformation and building structural health monitoring. However, in large-height-difference scenarios where the height difference between the base
Peida Wu, Peida Wu, Weixing Zhang, Yidong Lou, Yidong Lou, Mengjie Liu, Wanke Liu, Hong Chen, Zhizhao Liu   +8 more
doaj   +2 more sources

TransXLT: A novel ZTD prediction method with SASR-based data reconstruction [PDF]

iScience
Summary: Traditional Zenith Tropospheric Delay (ZTD) models often face difficulties in maintaining prediction accuracy under complex meteorological conditions and data loss.
Shicheng Xie, Xuexiang Yu, Jiajia Yuan, Xu Yang, Mingfei Zhu, Yuchen Han, Min Wei, Zhongchen Guo   +7 more
doaj   +2 more sources

High-Precision All-Weather FY-4A PWV Reconstruction Models Using GPT3 and ERA5 Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
All-weather, high-resolution precipitable water vapor (PWV) is beneficial for weather monitoring. Although FY-4A PWV provides high spatiotemporal resolution, it is affected by weather conditions, resulting in extensive data gaps. To obtain all-weather FY-
Xiaoning Zhang, Xiongwei Ma, Qi Zhang, Bao Zhang, Yunzheng Huang, Yuqing Liu, Chaoqian Xu, Yibin Yao   +7 more
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A precipitation forecast model applied with the RBF based on the improved GPT3 model in Japan

, 2023
Abstract Accurate monitoring of atmospheric water vapor content is essential for the early warning of extreme weather events. As known, GNSS zenith troposphere delay (GNSS_ZTD) is an indispensable data source for retrieving precipitable water vapor (PWV).
li song, Nan Jiang, Tianhe Xu, Yan Xu, Honglei Yang, Zhen Zhang, Ao Guo, Yuhao Wu   +7 more
openaire   +1 more source

Refining the ERA5-based global model for vertical adjustment of zenith tropospheric delay

Satellite Navigation, 2022
Tropospheric delay is an important factor affecting high precision Global Navigation Satellite System (GNSS) positioning and also the basic data for GNSS atmospheric research.
Ge Zhu, Liangke Huang, Yunzhen Yang, Junyu Li, Lv Zhou, Lilong Liu   +5 more
doaj   +1 more source

A New Approach for the Development of Grid Models Calculating Tropospheric Key Parameters over China

Remote Sensing, 2021
Pressure, water vapor pressure, temperature, and weighted mean temperature (Tm) are tropospheric parameters that play an important role in high-precision global navigation satellite system navigation (GNSS).
Ge Zhu, Liangke Huang, Lilong Liu, Chen Li, Junyu Li, Ling Huang, Lv Zhou, Hongchang He   +7 more
doaj   +1 more source

Comparative analysis of blind tropospheric correction models in Ghana

Journal of Geodetic Science, 2021
The impact of the earth’s atmospheric layers, particularly the troposphere on Global Navigation satellite system (GNSS) signals has become a major concern in GNSS accurate positioning, navigation, surveillance and timing applications.
Osah S., Acheampong A. A., Fosu C., Dadzie I.   +3 more
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Development of a ZTD Vertical Profile Model Considering the Spatiotemporal Variation of Height Scale Factor with Different Reanalysis Products in China

Atmosphere, 2022
Tropospheric delay is one of the key factors that may affect high-precision satellite navigation and positioning and water vapor retrieval performance.
Xin Wang, Ge Zhu, Liangke Huang, Haoyu Wang, Yunzhen Yang, Junyu Li, Ling Huang, Lv Zhou, Lilong Liu   +8 more
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Comprehensive Analysis and Validation of the Atmospheric Weighted Mean Temperature Models in China

Remote Sensing, 2022
Atmospheric weighted mean temperature (Tm) is a key parameter used by the Global Navigation Satellite System (GNSS) for calculating precipitable water vapor (PWV).
Yongjie Ma, Qingzhi Zhao, Kan Wu, Wanqiang Yao, Yang Liu, Zufeng Li, Yun Shi   +6 more
doaj   +1 more source

WTM: The Site-Wise Empirical Wuhan University Tropospheric Model

Remote Sensing, 2022
The tropospheric model is the key model in space geodetic techniques such as Global Navigation Satellite Systems (GNSS) and Very Long Baseline Interferometry (VLBI).
Yaozong Zhou, Yidong Lou, Weixing Zhang, Peida Wu, Jingna Bai, Zhenyi Zhang   +5 more
doaj   +1 more source