Results 31 to 40 of about 223,361 (218)

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

open access: yesE3S 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   +4 more
doaj   +1 more source

GPS derived Zenith Total Delay (ZTD) observed at tropical locations in South India during atmospheric storms and depressions

open access: yesJournal of Atmospheric and Solar-Terrestrial Physics, 2015
A. Akilan   +4 more
semanticscholar   +3 more sources

Kinematic ZTD Estimation from Train-Borne Single-Frequency GNSS: Validation and Assimilation

open access: yesRemote Sensing, 2021
Water vapour is one of the most important parameters utilized for the description of state and evolution of the Earth’s atmosphere. It is the most effective greenhouse gas and shows high variability, both in space and time.
Matthias Aichinger-Rosenberger   +2 more
doaj   +1 more source

Using ground-based GPS to characterize atmospheric turbulence [PDF]

open access: yes, 2009
A new method for measuring and studying atmospheric turbulence is presented. The method uses data from a local network of GPS receivers. The GPS data are processed in a way that assures that the estimated zenith total delays (ZTD) contain the effects of ...
Davis, J.L., Hill, E.M., Nilsson, Tobias
core   +1 more source

GPS Zenith Total Delays and Precipitable Water in comparison with special meteorological observations in Verona (Italy)during MAP-SOP

open access: yesAnnals of Geophysics, 2002
Continuous meteorological examination of the Pre-Alpine zones in Northern Italy (Po Valley)is important for determination of atmospheric water cycles connected with floods and rainfalls.During a special meteorological observing period (MAP-SOP ...
S. Corradini   +7 more
doaj   +1 more source

Characterization of site-specific GPS errors using a short-baseline network of braced monuments at Yucca Mountain, southern Nevada [PDF]

open access: yes, 2009
We use a short-baseline network of braced monuments to investigate site-specific GPS effects. The network has baseline lengths of ∼10, 100, and 1000 m. Baseline time series have root mean square (RMS) residuals, about a model for the seasonal cycle, of 0.
Davis, James L.   +5 more
core   +2 more sources

Retrieval of a High-Precision Drought Monitoring Index by Using GNSS-Derived ZTD and Temperature

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Potential evapotranspiration (PET) is a key parameter for calculating drought monitoring index that is generally difficult to obtain. In addition, PET has low spatial resolution and can only be obtained at a site-based point.
Qingzhi Zhao   +3 more
doaj   +1 more source

Estimating integrated water vapor trends from VLBI, GPS,and numerical weather models: sensitivity totropospheric parameterization [PDF]

open access: yes, 2018
©2018. American Geophysical UnionIn this study, we estimate integrated water vapor (IWV) trends from very long baseline interferometry (VLBI) and global navigation satellite systems (GNSS) data analysis, as well as from numerical weather models (NWMs ...
Balidakis, Kyriakos   +6 more
core   +1 more source

A Case Study on the Impact of Ensemble Data Assimilation with GNSS-Zenith Total Delay and Radar Data on Heavy Rainfall Prediction

open access: yesMonthly Weather Review, 2020
The performance of a numerical weather prediction model using convective-scale ensemble data assimilation with ground-based global navigation satellite systems-zenith total delay (ZTD) and radar data is investigated on a heavy rainfall event that ...
Shu‐Chih Yang   +4 more
semanticscholar   +1 more source

General Survey of Large-scale Land Subsidence by GACOS-Corrected InSAR Stacking: Case Study in North China Plain [PDF]

open access: yesProceedings of the International Association of Hydrological Sciences, 2020
Satellite-based InSAR (Interferometric Synthetic Aperture Radar) provides an effective way to measure large-scale land surface motions. Currently, the atmospheric phase delay is one of the most critical issues in InSAR deformation monitoring.
R. Xiao   +6 more
doaj   +1 more source

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