Results 21 to 30 of about 122 (119)

An improved GNSS remote sensing technique for 3D distribution of tropospheric water vapor

Meteorological Applications, Volume 30, Issue 4, July/August 2023., 2023
Vertical grid division diagram. Different colors represent different heights. Abstract Water vapor plays an extremely important role in the monitoring and prediction of weather, and GNSS tomography can obtain 3D spatiotemporal change information and reliable water vapor profiles.
Ankang Long, Shirong Ye, Pengfei Xia
wiley   +1 more source

Tropospheric Delay Calibration System Performance During the First Two BepiColombo Solar Conjunctions

Radio Science, Volume 58, Issue 2, February 2023., 2023
Abstract Media propagation delay and delay‐rate induced by the water vapor within the Earth's troposphere represent one of the main error sources for radiometric measurements in deep space. In preparation for the BepiColombo and JUICE missions, the European Space Agency has installed and operates the prototype of a tropospheric delay calibration system
Riccardo Lasagni Manghi, David Bernacchia, Luis Gomez Casajus, Marco Zannoni, Paolo Tortora, Antonio Martellucci, Javier De Vicente, Jose Villalvilla, Gerrit Maschwitz, Paolo Cappuccio, Luciano Iess   +10 more
wiley   +1 more source

Zenith Wet Delay (ZWD) Seasonal Correlation with Rainfall in Cikapundung River Discharge, North Bandung Region, Indonesia [PDF]

E3S Web of Conferences, 2019
In a GPS survey study, the biases produced by the ionosphere and troposphere layers are known as ionospheric biases and troposphere bias. The distance deviation due to the slowing travel time of GPS signals in troposphere is commonly referred to as ...
Kuntjoro Wedyanto, Wijaya D.D., Pramansyah A., Tanuwijaya Z.A.J., Pradipta Dhota   +4 more
doaj   +1 more source

Impact of Tropospheric Ties on UT1‐UTC in GNSS and VLBI Integrated Solution of Intensive Sessions

Journal of Geophysical Research: Solid Earth, Volume 127, Issue 11, November 2022., 2022
Abstract Very Long Baseline Interferometry (VLBI) intensive (INT) sessions are critical for the rapid determination and densification of Universal Time 1‐Coordinate Universal Time (UT1‐UTC), which plays an important role in satellite geodesy and space exploration missions and is not predictable over longer time scales.
Jungang Wang, Maorong Ge, Susanne Glaser, Kyriakos Balidakis, Robert Heinkelmann, Harald Schuh   +5 more
wiley   +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

Tropical tropopause in Tibet: Insights from ground‐based global navigation satellite system and space‐based radio occultation observations

Meteorological Applications, Volume 29, Issue 4, July/August 2022., 2022
Ground‐based global navigation satellite system (GNSS) and radio occultation observations are combined to study the determination method, seasonal distribution and interannual variation of the tropopause in Tibet, China. The results confirm that GNSS data can be used to detect the height of the tropopause. Abstract Changes in the tropopause can explain
Guangwei Jiang, Yingying Shan, Chunxi Guo, Hong Zhao, Bin Wang, Dajiang Zhao   +5 more
wiley   +1 more source

Empirical model for mean temperature and assessment of precipitable water vapor derived from GPS

Geodesy and Geodynamics, 2013
The estimation of Precipitable Water Vapor (PWV) derived from Global Positioning System (GPS) data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data (No.57494) in Wuhan.
Tang Yanxin, Liu Lilong, Yao Chaolong
doaj   +1 more source

A Global Assessment of Precipitable Water Vapor Derived From GNSS Zenith Tropospheric Delays With ERA5, NCEP FNL, and NCEP GFS Products

Earth and Space Science, 2021
In precipitable water vapor (PWV) retrievals from Global Navigation Satellite System (GNSS) data, the two essential parameters, namely, surface pressure (Ps) and weighted mean temperature (Tm), are often not available due to the lack of collocated ...
Biyan Chen, Wenkun Yu, Wei Wang, Zhetao Zhang, Wujiao Dai   +4 more
doaj   +1 more source

A Global Model for Estimating Tropospheric Delay and Weighted Mean Temperature Developed with Atmospheric Reanalysis Data from 1979 to 2017

Remote Sensing, 2019
Precise modeling of tropospheric delay and weighted mean temperature (Tm) is critical for Global Navigation Satellite System (GNSS) positioning and meteorology.
Zhangyu Sun, Bao Zhang, Yibin Yao
doaj   +1 more source

Empirical model for mean temperature for Indian zone and estimation of precipitable water vapor from ground based GPS measurements [PDF]

Annales Geophysicae, 2007
Estimation of precipitable water (PW) in the atmosphere from ground-based Global Positioning System (GPS) essentially involves modeling the zenith hydrostatic delay (ZHD) in terms of surface Pressure (Ps) and subtracting it from the corresponding ...
C. Suresh Raju, K. Saha, B. V. Thampi, K. Parameswaran   +3 more
doaj   +1 more source