Results 1 to 10 of about 221,487 (235)
Airborne Coherent GNSS Reflectometry and Zenith Total Delay Estimation over Coastal Waters
Remote Sensing, 2022 High-precision GNSS (global navigation satellite e system) measurements can be used for remote sensing and nowadays play a significant role in atmospheric sounding (station data, radio occultation observations) and sea surface altimetry based on ...
Mario Moreno +6 more
doaj +5 more sources
A Global Conversion Factor Model for Mapping Zenith Total Delay onto Precipitable Water [PDF]
Remote Sensing, 2022 The conversion factor is a key parameter for converting zenith wet delays (ZWD) into precipitable water vapour (PWV) with a mean value of 0.15, and the traditional method of calculating it is to model the weighted average temperature in the process of ...
Qingzhi Zhao +8 more
doaj +3 more sources
An Improved Model for Detecting Heavy Precipitation Using GNSS-Derived Zenith Total Delay Measurements [PDF]
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 +3 more sources
Impact of the variational assimilation of ground-based GNSS zenith total delay into AROME-Morocco model [PDF]
Tellus: Series A, Dynamic Meteorology and Oceanography, 2020 The impact of assimilating zenith total delay (ZTD) observations from the Moroccan ground-based Global Navigation Satellite System (GNSS) network into the high-resolution operational model AROME-Morocco (2.5 km) is assessed over one month.
Fatima Zahra Hdidou +5 more
doaj +3 more sources
Remote SensingCurrently, ground-based global navigation satellite system (GNSS) techniques have become widely recognized as a reliable and effective tool for atmospheric monitoring, enabling the retrieval of zenith total delay (ZTD) and precipitable water vapor (PWV ...
Qiuying Huang +7 more
doaj +3 more sources
Zenith total delay study of a mesoscale convective system : GPS observations and fine-scale modelling [PDF]
Tellus A: Dynamic Meteorology and Oceanography, 2009 Zenith Total Delay (ZTD) observations and model calculations are used to analyze a mesoscale convective system which yielded a large amount of precipitation over a short period of time in the north-western Mediterranean. ZTD observations are derived from
Cucurull, I. +2 more
core +12 more sources
Comparative analysis of real-time precise point positioning zenith total delay estimates [PDF]
GPS Solutions, 2016 The continuous evolution of global navigation satellite systems (GNSS) meteorology has led to an increased use of associated observations for operational modern low-latency numerical weather prediction (NWP) models, which assimilate GNSS-derived zenith ...
F. Ahmed +5 more
semanticscholar +4 more sources
Frontiers in Earth Science, 2020 Atmospheric Phase Screens (APSs) derived from Interferometric Synthetic Aperture Radar (InSAR) observations contain the difference between the tropospheric water-vapor-induced delay of two acquisition epochs, i.e., the slave and the master (or reference)
Agostino N. Meroni +12 more
doaj +2 more sources
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 +2 more sources
Zenith total delay short-term statistical forecasts for GNSS Precise Point Positioning [PDF]
Acta Geodynamica et Geomaterialia, 2015 Troposphere delay values may be applied either in positioning or meteorology. Several troposphere delay empirical models are available as functions of meteorological parameters (temperature, air pressure and relative humidity); the zenith total delay ...
K. Wilgan
semanticscholar +2 more sources