Results 101 to 110 of about 711,710 (171)

Effects of stratosphere-troposphere chemistry coupling on tropospheric ozone [PDF]

, 2010
[1] A new, computationally efficient coupled stratosphere-troposphere chemistry-climate model (S/T-CCM) has been developed based on three well-documented components: a 64-level general circulation model from the UK Met Office Unified Model, the ...
Wenshou Tian, Martyn P. Chipperfield, Anu Dudhia, Dhomse, Sandip, Damoah, Richard, Chipperfield, Martyn P., Richard Damoah, Tian, Wenshou, Dudhia, Anu, Peter Bernath, Stevenson, David S.; id_orcid, Bernath, Peter, David S. Stevenson, Sandip Dhomse, Hugh Pumphrey, Pumphrey, Hugh   +15 more
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The effect of modified UNBabc mapping function on the improvement of global positioning system tropospheric delay [PDF]

, 2010
Global Positioning System (GPS) tropospheric delay refers to the refraction of the GPS signal as it passes through the neutral atmosphere from the satellite to the earth, which causes longer distance traveled by the signal. The issue of atmospheric delay
Husna Zayadi
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A Study on Wet Tropospheric Delay Error Estimation for the Navigation Signals over Indian Region

656-669The present work deals with the wet tropospheric delay estimation using the different models for navigation signals over the Indian region. Results from various mathematical models are analysed for saturation vapour pressure, partial vapour ...
Srivastava, Ashutosh
core   +1 more source

Tropospheric delay effects on relative GPS height determination [PDF]

, 2005
In the global positioning system (GPS) surveying for point positioning, one of the principal limiting error source is incorrect modeling of the delay experienced by GPS signal propagating through the electrically neutral atmosphere, usually referred to ...
Mohd. Zaki, Mohd. Zahlan, Kamarudin, Md. Nor   +1 more
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Simplification Of Neill Mapping Function (NMF) For GPS Tropospheric Delay

, 2007
The mathematical modeling 011 the mapping function models should be revised and also simplified to improve the calculation of the GPS tropospheric delay.
Sadikin, Hamzah
core   +1 more source

Improving GNSS precise point positioning with tropospheric constraints from data-driven numerical weather prediction model

Geo-spatial Information Science
Accurate priori tropospheric knowledge is advantageous for Global Navigation Satellite System (GNSS) precise point positioning (PPP), which significantly influences both convergence time and the accuracy of tropospheric delay estimations.
Yuanfan Deng, Wu Chen, Junsheng Ding, Ahmed El-Mowafy, Duojie Weng, Long Tang, Lei Bai, Xiaolong Mi   +7 more
doaj   +1 more source

Variability of GPS-derived zenith tropospheric delay and some result of its assimilation into numeric atmosphere model [PDF]

, 2012
The total zenith tropospheric delay (ZTD) is an important parameter of the atmo- sphere and directly or indirectly reflects the weather processes and variations.
Khutorova O., Khutorov V., Kalinnikov V., Kurbangaliev T., Teptin G.   +4 more
core  

Optimized GNSS tropospheric delay model for high-precision dam deformation monitoring in large height difference environments

Array
Tropospheric delay is a critical error in Global Navigation Satellite System (GNSS) high-precision positioning, particularly in dam deformation monitoring requiring millimeter-level accuracy.
Yan Chen, Xingyu Zhou, Xiaowu Hu, Xuexi Liu, Zhuoni Jin, Jiayan Shen, Mingyuan Zhang, Jie Wang   +7 more
doaj   +1 more source

Zenith Tropospheric Delay Forecasting in the European Region Using the Informer–Long Short-Term Memory Networks Hybrid Prediction Model

Atmosphere
Zenith tropospheric delay (ZTD) is a significant atmospheric error that impacts the Global Navigation Satellite System (GNSS). Developing a high-precision, long-term forecasting model for ZTD can provide valuable insights into the overall trends of ...
Zhengdao Yuan, Xu Lin, Yashi Xu, Jie Zhao, Nage Du, Xiaolong Cai, Mengkui Li   +6 more
doaj   +1 more source

A New Tropospheric Delay Model For

, 2001
GPS can play an important role in high-altitude vehicle positioning. In such GPS applications the residual tropospheric delay in GPS measurements is a major error source.
Jinling Wang, Toshiharu Inagaki, Masatoshi Harigae, High-Altitude Vehicle Positioning, Chris Rizos, Toshiaki Tsujii   +5 more
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