Results 71 to 80 of about 3,196 (215)

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
core   +1 more source

Multi‐Step Gravity Wave Propagation From a Tropospheric Vortex to the Ionosphere Near the Tibetan Plateau

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The atmosphere and ionosphere form a vertically coupled system in which disturbances in the lower atmosphere can modulate ionospheric variability. Using reanalysis data, ground‐based GNSS observations, and COSMIC‐2 profiles, we investigate gravity waves (GWs) generation and upward coupling during a southwest vortex (SWV) event over the Tibetan
Wei Yao, Huijun Le, Wenjie Sun, Libo Liu, Yiding Chen   +4 more
wiley   +1 more source

The effect of UNBabc mapping function modification to GPS tropospheric delay [PDF]

, 2008
Tropospheric delay refers to the refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth, which causes longer distance traveled by the signal.
Sakidin, Hamzah, Md Nooraini, Mohd Salmi, Matori, Abd. Nasir, Mohamed Shariff, Abdul Rashid, Ahamd, Asmala, Mohamed, Azhari, Abu Bakar, Mohd Rizam   +6 more
core   +1 more source

Quantitative analysis of the tropospheric delay difference using empirical mapping functions on VLBI stations

Frontiers in Astronomy and Space Sciences
Tropospheric delay is a major error source for the high-accuracy Very Long Baseline Interferometry (VLBI) technique due to rapid water vapor variations. The Niell mapping function (NMF) and Global Mapping Function (GMF) are extensively applied to convert
W. L. Zhou, W. L. Zhou, W. L. Zhou, W. L. Zhou, S. L. Song, S. L. Song, J. Jiang, J. Jiang, X. Hu, P. J. Li, P. J. Li, Z. B. Zhang, Z. B. Zhang, Z. B. Zhang   +13 more
doaj   +1 more source

Current and Future Changes in Earth's Outgoing Infrared Spectrum

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Hyperspectral infrared satellite observations provide an information‐rich, global record of climate mean state and change without the structural uncertainties often present satellite retrievals and reanalyses. Current and planned hyperspectral satellite missions will continuously observe changes in Earth's outgoing infrared spectrum into the ...
J. K. Shaw, J. E. Kay, S. DeSouza‐Machado, D. D. Turner, L. L. Strow   +4 more
wiley   +1 more source

The Influence of Zenith Tropospheric Delay on PPP-RTK [PDF]

Journal of Applied Engineering Sciences, 2016
Abstract The PPP technique is more and more used in different GPS precise application. The PPP precision is related to many factors and the most important are: the number of satellites, the ambiguity resolution, the ability to model the ionospheric and tropospheric delays, solid earth and ocean tides, relativistic effects and antenna ...
S. Nistor, A.S. Buda
openaire   +1 more source

The Effect of Modified UNBabc Mapping Function On the Improvement of Global Positioning System Tropospheric Delay [PDF]

, 2009
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
Sakidin, Hamzah, Sakidin, Saedah, Tay, Choo Chuan   +2 more
core   +1 more source

Real-Time Tropospheric Delay Retrieval from Multi-GNSS PPP Ambiguity Resolution: Validation with Final Troposphere Products and a Numerical Weather Model

Remote Sensing, 2018
The multiple global navigation satellite systems (multi-GNSS) bring great opportunity for the real-time retrieval of high-quality zenith tropospheric delay (ZTD), which is a critical quality for atmospheric science and geodetic applications.
Cuixian Lu, Xin Li, Junlong Cheng, Galina Dick, Maorong Ge, Jens Wickert, Harald Schuh   +6 more
doaj   +1 more source

Historical Volcanic Eruptions Mitigated the Expected Rapid Arctic Sea Ice Decline Prior to 2000

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Arctic sea ice has declined at sharply contrasting rates over the past four decades—modest before 2000 and rapid thereafter. Using observational and model evidence, we show that large tropical volcanic eruptions can trigger decade‐long Arctic sea ice recoveries, and that without the 1982 El Chichón and 1991 Pinatubo eruptions, Arctic sea ice ...
Xinyue Wang, Fei Liu, Wenjie Dong, Qinghua Ding   +3 more
wiley   +1 more source

Mitigating Residual Tropospheric Delay to Improve User’s Network-Based Positioning [PDF]

, 2004
Existing apriori tropospheric models are not sufficiently accurate to remove tropospheric delay from GPS observations. Remaining effects of residual tropospheric delay need to be estimated to ensure high accuracy and reliability of GPS positioning ...
Lee, Young-Jin, Jinling Wang, Young-jin Lee, Wang, Jinling, Mohamed, Azhari, Rizos, Chris, Azhari Mohamed, Musa, Tajul A, Chris Rizos, Tajul A. Musa, Musa, Tajul A.   +10 more
core