Results 71 to 80 of about 1,293 (182)

Improving Interpolating Accuracy of Weighted Mean Temperature by Using a Novel Lapse Rate Model in Compact VMF1 Product

Earth and Space Science, Volume 11, Issue 11, November 2024.
Abstract In GNSS (Global Navigation Satellite Systems) meteorology, the accuracy of precipitable water vapor (PWV) retrieved from the tropospheric delay of GNSS signals is affected by the conversion factor. Compact VMF1 product (known as GGOS Atmosphere data) provides high‐accuracy global grid‐wise weighted mean temperature (Tm) values, which can be ...
Peng Sun, Kefei Zhang, Dantong Zhu, Moufeng Wan, Ren Wang, Suqin Wu   +5 more
wiley   +1 more source

Long-term monitoring of geodynamic surface deformation using SAR interferometry [PDF]

, 2014
Thesis (Ph.D.) University of Alaska Fairbanks, 2014Synthetic Aperture Radar Interferometry (InSAR) is a powerful tool to measure surface deformation and is well suited for surveying active volcanoes using historical and existing satellites.
Gong, Wenyu, 龚文瑜
core  

Spatio‐Temporal Characteristics and Variability of GNSS‐Derived Atmospheric Precipitable Water Vapor From 2010 to 2023 in Fujian Province, China

Earth and Space Science, Volume 11, Issue 9, September 2024.
Abstract Atmospheric precipitable water vapor (PWV) is a crucial factor affecting precipitation and the atmospheric environment. To quantitatively investigate the spatio‐temporal distribution and characteristics of the PWV in Fujian, China, its diurnal and seasonal variations are analyzed based on the global navigation satellite system (GNSS) data from
Weihua Pan, Shuiying Wang, Chuhan Su, Yongjiang Yu, Ling Li, Shenheng Weng   +5 more
wiley   +1 more source

An optimized BP neural network for modeling zenith tropospheric delay in the Chinese mainland using coupled particle swarm and genetic algorithm

Geo-spatial Information Science
Tropospheric delay influences high-precision navigation positioning and precipitable water vapor retrieval with the Global Navigation Satellite System (GNSS).
Liangke Huang, Haohang Bi, Hongxing Zhang, Shitai Wang, Fasheng Liao, Lilong Liu, Weiping Jiang   +6 more
doaj   +1 more source

Analyzing the Tropospheric Delay Estimates on Global Navigation Satellite Systems (GNSS) with Precise Point Positioning (PPP) Services using the goGPS software

Journal of Geospatial Information Science and Engineering, 2020
The tropospheric delay is an essential source of error for positioning using the Global Navigation Satellite System (GNSS). Scientific applications of GNSS positioning such as the study of earth crust deformation and earthquake prediction require high ...
Syachrul Arief, Andrea Gatti
doaj   +1 more source

Penentuan Zenith Tropospheric Delay Dan Precipitable Water Vapor Menggunakan Perangkat Lunak Gamit [PDF]

, 2015
The signals from each Global Positioning System (GPS) satellites that orbiting above the earth\u27s surface will be received by a receiver through the layers of atmosphere.
Awaluddin, M. (Moehammad), Gusfarienza, H. (Heri), Susilo, S. (Susilo), Yuwono, B. D. (Bambang)   +3 more
core  

Subtle Land Subsidence Elevates Future Storm Surge Risks Along the Gulf Coast of the United States

Journal of Geophysical Research: Earth Surface, Volume 129, Issue 9, September 2024.
Abstract We developed a robust InSAR processing strategy that can effectively mitigate severe decorrelation noise in a large volume of InSAR data. We mapped the average land subsidence rate (2017–2020) over the 131,572 km2 Upper Texas and Louisiana coasts from Sentinel‐1 data, with ∼2 mm/yr accuracy based on independent GPS and tide gauge validation at
Ke Wang, Jingyi Chen, Eirik Valseth, Gordon Wells, Srinivas Bettadpur, Cathleen E. Jones, Clint Dawson   +6 more
wiley   +1 more source

Enhancing Atmospheric Monitoring Capabilities: A Comparison of Low- and High-Cost GNSS Networks for Tropospheric Estimations

Remote Sensing
Global Navigation Satellite System (GNSS) signals experience delays when passing through the atmosphere due to the presence of free electrons in the ionosphere and air density in the non-ionized part of the atmosphere, known as the troposphere.
Paolo Dabove, Milad Bagheri
doaj   +1 more source

A new vertical reduction model for enhancing the interpolation accuracy of VMF1/VMF3 tropospheric delay products [PDF]

Geoscientific Model Development
Grid-wise Vienna Mapping Functions 1 (VMF1) and Vienna Mapping Functions 3 (VMF3) tropospheric products are widely used to interpolate the a priori zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD) over GNSS (Global Navigation Satellite Systems ...
P. Sun, K. Zhang, K. Zhang, D. Zhu, S. Shi, X. Liu, D. Zhao, M. Zhang, S. Wu   +8 more
doaj   +1 more source

Effects of the High-Order Ionospheric Delay on GPS-Based Tropospheric Parameter Estimations in Turkey

Remote Sensing, 2020
The tropospheric delay and gradients can be estimated using Global Positioning System (GPS) observations after removing the ionospheric delay, which has been widely used for atmospheric studies and forecasting.
Volkan Akgul, Gokhan Gurbuz, Senol Hakan Kutoglu, Shuanggen Jin   +3 more
doaj   +1 more source