Results 81 to 90 of about 763,719 (165)

Improving atmospheric pressure vertical correction model using Gaussian function

Geodesy and Geodynamics
The Zenith Hydrostatic Delay (ZHD) is essential for high-precision Global Navigation Satellite System (GNSS) and Very Long Baseline Interferometry (VLBI) data processing.
Baoshuang Zhang, Junyu Li, Lilong Liu, Yibin Yao, Liangke Huang, Chao Ren, Hongchang He, Tengxu Zhang, Yuxin Wang   +8 more
doaj   +1 more source

Alternative Strategy for Estimating Zenith Tropospheric Delay from Precise Point Positioning

, 2017
. This study considered zenith total delay (ZTD) estimation from precise point positioning (PPP) based on GPS only (PPP GPS), GLONASS only (PPP GLO), and GPS+GLONASS (PPP GPS+GLO) using both a conventional strategy when applying a model for the ...
Jareer Mohammed, Richard M. Bingley, Chris Hill, Terry Moore   +3 more
core   +1 more source

The Impact of Simplified UNBab Mapping Function On GPS Tropospheric Delay [PDF]

, 2014
The atmospheric delay issue is widely investigated in order to minimize the positioning error due to tropospheric and ionospheric delay. The mathematical modeling on the tropospheric model mapping functions should be revised and also simplified to ...
Sakidin, Hamzah, Asmala, A., Tay, Choo Chuan   +2 more
core   +2 more sources

Assessing the Accuracy of ECMWF Operational Atmospheric Forecasts with Tropospheric Delays from Ray Tracing

Applied Sciences
This study presents a comprehensive global accuracy assessment of the medium-range (up to 15 days) forecast pressure-level data generated by the physics-based Integrated Forecast System (IFS) and the newly operational, data-driven Artificial Intelligence
Özgür Özel, Kamil Teke
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  

Spatial Interpolation of GNSS Troposphere Wet Delay by a Newly Designed Artificial Neural Network Model

Applied Sciences, 2019
Global Navigation Satellite System (GNSS) signals arrive at the Earth in a nonlinear and slightly curved way due to the refraction effect caused by the troposphere. The troposphere delay of the GNSS signal consists of hydrostatic and wet parts.
Mahmut Oguz Selbesoglu
doaj   +1 more source

UNIVERSITY OF CALGARY Investigations into the Estimation of Tropospheric Delay And Wet Refractivity Using GPS Measurements

, 2003
The principal error source in the GPS technology is a delay experienced by the GPS signal in propagating through the electrically neutral atmosphere, usually referred to as a tropospheric delay.
Sudhir Man Shrestha
core  

High-accuracy zenith delay prediction at optical wavelengths,” Geophysical Res

, 2020
[1] A major limitation in accuracy in modern satellite laser ranging is the modeling of atmospheric refraction. Recent improvements in this area include the development of mapping functions to project the atmospheric delay experienced in the zenith ...
V B Mendes, E C Pavlis
core  

Temporal Variation Analysis From Troposphere Delay Using GPS (Study: Bandung, Indonesia) [PDF]

, 2012
.Tropospheric delay is the amount of distortion caused by the deceleration of satellite's signal propagation due to the influence of troposphere. The value of this delay is certain effect of elevation angle that is called the slant delay.
Prijatna, Kosasih, Pradipta, Dhota, Kuntjoro, Wedyanto   +2 more
core  

China coastal GNSS network: advancing precipitable water vapor monitoring and applications in climate analysis [PDF]

Earth System Science Data
The Global Navigation Satellite System (GNSS) offers precise, continuous monitoring of atmospheric water vapor, essential for weather forecasting and climate research.
Z. Wu, B. Li, Q. Liu, Y. Liu, H. Zhang, D. Zhou, Y. Liu   +6 more
doaj   +1 more source