Results 11 to 20 of about 343 (133)

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
doaj   +4 more sources

GNSS-retrieved precipitable water vapour in the Atlantic coast of France and Spain with GPT3 model

Acta Geodaetica et Geophysica, 2023
AbstractWater vapour is a critical atmospheric parameter to understand the Earth's climate system and it is characterized by a complex variability in time and space. GNSS observations have become an important source of information of the water vapour, thanks to its high temporal and spatial resolution.
Raquel Perdiguer-Lopez, José Luis Berne Valero, Natalia Garrido-Villen   +2 more
openaire   +5 more sources

Characterization of Surface Pressure Accuracy and Spatial and Temporal Variations of The GPT3 And HGPT2 Models in The Chinese Region

Academic Journal of Science and Technology
The accuracy of surface pressure is crucial for obtaining high-precision zenith hydrostatic delay(ZHD). In order to verify the accuracy of the Global Pressure and Temperature model (HGPT2 ) and the Global Pressure and Temperature (GPT3) in obtaining ground air pressure in China, as well as the spatiotemporal variation characteristics of the errors of ...
Sen Li, Kai Wang, Haofei Ban, Chen Xue, Yongxiao Guo   +4 more
openaire   +3 more sources

High-Precision ZTD Model of Altitude-Related Correction

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Zenith tropospheric delay (ZTD) is one of the main error sources in space geodesy. The existing regional or global models, such as Global Pressure and Temperature 3 (GPT3), Global Tropospheric model, Global Hopfield, and Shanghai Astronomical observatory
Qingzhi Zhao, Jing Su, Chaoqian Xu, Yibin Yao, Xiaoya Zhang, Jifeng Wu   +5 more
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

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