Results 21 to 30 of about 139 (96)

A Global Assessment of Diurnal Discontinuities in ERA5 Tropospheric Zenith Total Delays Using 10 Years of GNSS Data

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract The diurnal cycle of tropospheric Zenith Total Delays (ZTD) is critical for refining tropospheric models and understanding key geophysical and atmospheric processes. The fifth European Centre for Medium‐Range Weather Forecasts reanalysis ERA5, with its unique 1‐hr temporal resolution, provides valuable data for these purposes.
Peng Yuan, Geoffrey Blewitt, Corné Kreemer, Weiping Jiang, Tianjun Liu, Linyu He, Qiang Shan, Kyriakos Balidakis, Harald Schuh, Jens Wickert, Zhiguo Deng   +10 more
wiley   +1 more source

Effect of phase centre variation on tropospheric delay in PPP‐AR with low‐cost global navigation satellite systems receiver and antenna

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2737-2748, December 2024.
When PCV corrections are not applied, it is clear that ambiguity resolution fails to improve the accuracy of ZWD estimates. The SEPMX5 receiver consistently outperforms the UBLX9F receiver in scenarios where PCV corrections are applied. Abstract As low‐cost global navigation satellite systems receiver and antenna become increasingly prevalent for water
Jizhong Wu, Xiaoying Wang, Hongyang Ma
wiley   +1 more source

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

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

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

Improving Sentinel‐3 Altimetry Data With GPD+ Wet Tropospheric Corrections

Earth and Space Science, Volume 11, Issue 8, August 2024.
Abstract The provision of accurate wet tropospheric corrections (WTC), accounting for the delay of the radar pulses caused mostly by the atmospheric water vapor in the altimeter‐range observations, is pivotal for the full exploitation of altimeter‐derived surface heights.
M. J. Fernandes, T. Vieira, C. Lázaro, B. Vasconcellos, P. Aguiar   +4 more
wiley   +1 more source

Evaluate the Impact of Regional Ionospheric Data Assimilation Model on Precise Point Positioning

Space Weather, Volume 22, Issue 8, August 2024.
Abstract This study presents an innovative approach to improving the accuracy and reducing the error convergence time of static Precise Point Positioning (PPP) in Global Positioning System (GPS) navigation. The research focuses on the impact of the high spatial and temporal resolution of a regional ionospheric data assimilation model on PPP over Taiwan.
Yan‐Shen Chen, Chia‐Hung Chen, Ming Yang, Feng‐Yu Chu   +3 more
wiley   +1 more source

Improving GNSS PPP Performance in the South China Under Different Weather Conditions by Using the Weather Research and Forecasting (WRF) Model‐Derived Wet Delay Corrections

Earth and Space Science, Volume 11, Issue 3, March 2024.
Abstract Atmospheric wet delay caused by Precipitable Water Vapor (PWV) significantly impacts the performance of many geodetic surveying systems such as Global Navigation Satellite System (GNSS). In this study, we use wet delay corrections forecast by the Weather Research and Forecasting (WRF) model to enhance GNSS Precise Point Positioning (PPP ...
Yangzhao Gong, Zhizhao Liu, Shiwei Yu, Pak Wai Chan, Kai Kwong Hon   +4 more
wiley   +1 more source

An Interferometric Synthetic Aperture Radar Tropospheric Delay Correction Method Based on a Global Navigation Satellite System and a Backpropagation Neural Network: More Suitable for Areas with Obvious Terrain Changes. [PDF]

Sensors (Basel), 2023
Qiu L, Chen P, Yao Y, Chen H, Tang F, Xiong M.   +5 more
europepmc   +1 more source

Evaluation of InSAR Tropospheric Delay Correction Methods in the Plateau Monsoon Climate Region Considering Spatial-Temporal Variability. [PDF]

Sensors (Basel), 2023
Yang Q, Zuo X, Guo S, Zhao Y.
europepmc   +1 more source