Results 61 to 70 of about 347,574 (237)

Remote sensing of tropospheric turbulence using GPS radio occultation [PDF]

open access: yes, 2016
Radio occultation (RO) measurements are sensitive to the small-scale irregularities in the atmosphere. In this study, we present a new technique to estimate tropospheric turbulence strength (namely, scintillation index) by analyzing RO amplitude ...
Ao, Chi, Shume, Esayas
core   +9 more sources

A Review of Selected Applications of GNSS CORS and Related Experiences at the University of Palermo (Italy)

open access: yesRemote Sensing, 2023
Services from the Continuously Operating Reference Stations (CORS) of the Global Navigation Satellite System (GNSS) provide data and insights to a range of research areas such as physical sciences, engineering, earth and planetary sciences, computer ...
Claudia Pipitone   +3 more
doaj   +1 more source

Using GNSS-IR Snow Depth Estimation to Monitor the 2022 Early February Snowstorm over Southern China

open access: yesRemote Sensing, 2022
Snow depth is an essential meteorological indicator for monitoring snow disasters. The Global Navigation Satellite System Interferometric Reflectometry (GNSS-IR) technique has been proven to be a practical approach to retrieving snow depth.
Jie Zhang   +5 more
doaj   +1 more source

Investigation on the automatic geo-referencing of archaeological UAV photographs by correlation with pre-existing ortho-photos [PDF]

open access: yes, 2014
We present a method for the automatic geo-referencing of archaeological photographs captured aboard unmanned aerial vehicles (UAVs), termed UPs. We do so by help of pre-existing ortho-photo maps (OPMs) and digital surface models (DSMs).
Briese, Christian   +4 more
core   +2 more sources

Seasonal Multifactor Modelling of Weighted-Mean Temperature for Ground-Based GNSS Meteorology in Hunan, China

open access: yes, 2017
In this study, radiosonde observations during the period of 2012-2013 from three stations in the Hunan region, China, were used to establish regional models (RTMs) that are a fitting function of multiple meteorological factors (, , and ). One-factor, two-
Li Li   +5 more
semanticscholar   +1 more source

Densification of the Ground-Based GNSS Observation Network in the Southwest Indian Ocean: Current Status, Perspectives, and Examples of Applications in Meteorology and Geodesy

open access: yesFrontiers in Earth Science, 2020
In the frame of the research project IOGA4MET, a new ground-based GNSS network is being deployed in the Southwest Indian Ocean (SWIO) since November 2017.
O. Bousquet   +9 more
semanticscholar   +1 more source

Real-Time Water Vapor Maps from a GPS Surface Network: Construction, Validation, and Applications [PDF]

open access: yes, 2009
In this paper the construction of real-time integrated water vapor (IWV) maps from a surface network of global positioning system (GPS) receivers is presented.
Haan, S., de   +2 more
core   +2 more sources

Saltwater Intrusion and Freshwater Storage in Sand Sediments along the Coastline: Hydrogeological Investigations and Groundwater Modeling of Nauru Island [PDF]

open access: yes, 2017
Water resources sustainable management is a vital issue for small islands where groundwater is often the only available water resource. Nauru is an isolated and uplifted limestone atoll island located in the Pacific Ocean. Politecnico di Milano performed
ALBERTI, LUCA   +2 more
core   +2 more sources

The underappreciated roles of fog and dew on vegetation and biocrusts

open access: yesNew Phytologist, EarlyView.
Summary Fog and dew represent minor components of ecosystem water budgets in most ecosystems. However, fog and dew can play an essential role in ecosystem dynamics and are particularly important for water‐limited systems. In addition to serving as direct water inputs, fog and dew can influence microclimate and water redistribution, thereby promoting ...
Lixin Wang, Yue Li, Mengyun Sun, Na Qiao
wiley   +1 more source

Refinement of global gridded ray-traced Zenith tropospheric delay over Nigeria based on local GNSS network observations

open access: yesGeosystems and Geoenvironment, 2023
Recent studies on the application of Zenith Tropospheric Delay (ZTD) in meteorology and geodesy have shown improved accuracy with the use of locally estimated ZTD compared to Global ZTD.
Ifechukwu Ugochukwu Nzelibe   +1 more
doaj   +1 more source

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