Results 51 to 60 of about 191 (136)
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 +10 more
wiley +1 more source
Applying the Water Vapor Radiometer to Verify the Precipitable Water Vapor Measured by GPS
Terrestrial, Atmospheric and Oceanic Sciences, 2014 Taiwan is located at the land-sea interface in a subtropical region. Because the climate is warm and moist year round, there is a large and highly variable amount of water vapor in the atmosphere.
Ta-Kang Yeh +4 more
doaj +1 more source
The Effects of Higher-Order Ionospheric Terms on GPS Tropospheric Delay and Gradient Estimates
Remote Sensing, 2018 Atmospheric delays, e.g., ionospheric delay and tropospheric delay, are the dominant error sources for the Global Navigation Satellite System (GNSS), especially for Precise Point Positioning (PPP).
Zhiyu Zhang, Fei Guo, Xiaohong Zhang
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 +3 more
doaj +1 more source
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 +5 more
wiley +1 more source
A zenith wet delay improved model in China based on GPT3 and random forest
Geodesy and GeodynamicsZenith wet delay (ZWD) is a key parameter for the precise positioning of global navigation satellite systems (GNSS) and occupies a central role in meteorological research.
Shaoni Chen +5 more
doaj +1 more source
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 +5 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 +4 more
wiley +1 more source
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 +4 more
wiley +1 more source
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