GPS derived Zenith Total Delay (ZTD) observed at tropical locations in South India during atmospheric storms and depressions [PDF]
Journal of Atmospheric and Solar-Terrestrial Physics, 2015 Abstract Global Positioning System (GPS) monitoring of Zenith Total Delay (ZTD) of the troposphere which is related to water vapor is important as it may help us in weather forecasting. The atmospheric water vapor varies according to the season and it also varies quickly on short temporal and spatial scales during stormy periods.
Akilan, A. +4 more
openaire +3 more sources
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 +4 more
doaj +1 more source
Anomalous Zenith Total Delays for an Insular Tropical Location: The Tahiti Island Case
Remote Sensing, 2022 The weighted mean temperature of the troposphere, Tm, is a key parameter in GNSS meteorology. It can be routinely derived based on meteorological data from radiosonde (RS) or numerical weather models. Alternatively, it can be also derived through a least-
Fangzhao Zhang +3 more
doaj +1 more source
High-Precision ZTD Model of Altitude-Related Correction
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 Zenith tropospheric delay (ZTD) is one of the main error sources in space geodesy. The existing regional or global models, such as Global Pressure and Temperature 3 (GPT3), Global Tropospheric model, Global Hopfield, and Shanghai Astronomical observatory
Qingzhi Zhao +5 more
doaj +1 more source
A new zenith hydrostatic delay model for real-time retrievals of GNSS-PWV [PDF]
Atmospheric Measurement Techniques, 2021 The quality of the zenith hydrostatic delay (ZHD) could significantly affect the accuracy of the zenith wet delay (ZWD) of the Global Navigation Satellite System (GNSS) signal, and from the ZWD precipitable water vapor (PWV) can be obtained.
L. Li +17 more
doaj +1 more source
The impact of global navigation satellite system (GNSS) zenith total delay data assimilation on the short-term precipitable water vapor and precipitation forecast over Italy using the Weather Research and Forecasting (WRF) model [PDF]
Natural Hazards and Earth System Sciences, 2023 The impact of assimilating GNSS-ZTD (global navigation satellite system–zenith total delay) on the precipitable water vapor and precipitation forecast over Italy is studied for the month of October 2019, which was characterized by several moderate to ...
R. C. Torcasio +8 more
doaj +1 more source
4D Tropospheric Tomography using GPS Estimated Slant Delays [PDF]
, 1999 Tomographic techniques are successfully applied to obtain 4D images of the tropospheric refractivity in a local dense network. In the lower atmosphere both the small height and time scales and the non-dispersive nature of tropospheric delays require a ...
A. Flores +8 more
core +8 more sources
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 In recent years, precipitable water vapor has been widely used in heavy precipitation prediction, which is obtained from a conversion of the zenith total delay (ZTD) of the GNSS signal.
Haobo Li +8 more
doaj +1 more source
HGPT2: An ERA5-Based Global Model to Estimate Relative Humidity
Remote Sensing, 2021 The neutral atmospheric delay is one of the major error sources in Space Geodesy techniques such as Global Navigation Satellite Systems (GNSS), and its modeling for high accuracy applications can be challenging.
Pedro Mateus +2 more
doaj +1 more source
Using ground-based GPS to characterize atmospheric turbulence [PDF]
, 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