Results 21 to 30 of about 164,436 (341)

Analysis of Ionospheric Scintillation Characteristics in Sub-Antarctica Region with GNSS Data at Macquarie Island

open access: yesSensors, 2017
Ionospheric scintillation has a great impact on radio propagation and electronic system performance, thus is extensively studied currently. The influence of scintillation on Global Navigation Satellite System (GNSS) is particularly evident, making GNSS ...
Kai Guo   +3 more
doaj   +1 more source

Composite scintillators based on ZnWO4:Me+ micropowders obtained by solid-state synthesis

open access: yesVìsnik Harkìvsʹkogo nacìonalʹnogo unìversitetu ìmenì V.N. Karazìna. Serìâ: fìzika., 2022
The paper considers the possibility of using the method of heterovalent doping to improve the functional characteristics (light output and afterglow level) of composite scintillators based on ZnWO4 micropowder obtained by solid-stase synthesis.
V.S. Tinkova   +5 more
doaj   +1 more source

The ionosphere prediction service prototype for GNSS users

open access: yesJournal of Space Weather and Space Climate, 2019
The effect of the Earth’s ionosphere represents the single largest contribution to the Global Navigation Satellite System (GNSS) error budget and abnormal ionospheric conditions can impose serious degradation on GNSS system functionality, including ...
Vadakke Veettil Sreeja   +13 more
doaj   +1 more source

Drones and global navigation satellite systems: current evidence from polar scientists [PDF]

open access: yesRoyal Society Open Science, 2020
Aerial unmanned vehicles, so-called drones, present a paradigm shift away from the long-term use by scientists of manned aeroplanes and helicopters. This is evident from the number of research articles that focus on data obtained with drones.
Iain Sheridan
doaj   +1 more source

Ce3+:Lu3Al5O12–Al2O3 optical nanoceramic scintillators elaborated via a low-temperature glass crystallization route

open access: yesJournal of Advanced Ceramics, 2023
Transparent Ce:lutetium aluminum garnet (Ce:Lu3Al5O12, Ce:LuAG) ceramics have been regarded as potential scintillator materials due to their relatively high density and atomic number (Zeff).
Jie Fu   +7 more
doaj   +1 more source

Unseasonal super ionospheric plasma bubble and scintillations seeded by the 2022 Tonga Volcano Eruption related perturbations

open access: yesJournal of Space Weather and Space Climate, 2022
The Hunga–Tonga volcano eruption at 04:14:45 UT on 15 January 2022 produced various waves propagating globally, disturbing the background atmosphere and ionosphere.
Sun Wenjie   +10 more
doaj   +1 more source

Time Series Irradiance Synthesizer for Optical GEO Satellite Downlinks in 5G Networks

open access: yesFuture Internet, 2019
Next generation 5G networks generate a need for broadband, low latency and power efficient backhauling and data-relay services. In this paper, optical satellite communications links, as an integrated component of 5G networks, are studied.
Theodore T. Kapsis   +3 more
doaj   +1 more source

Metal Halide Perovskite Nanosheet for X-ray High-Resolution Scintillation Imaging Screens.

open access: yesACS Nano, 2019
Scintillators, which are capable of converting ionizing radiation into visible photons, are an integral part of medical, security, and commercial diagnostic technologies such as X-ray imaging, nuclear cameras, and computed tomography.
Yuhai Zhang   +14 more
semanticscholar   +1 more source

X-ray Scintillation in Lead Halide Perovskite Crystals [PDF]

open access: yesScientific Reports, 2016
Current technologies for X-ray detection rely on scintillation from expensive inorganic crystals grown at high-temperature, which so far has hindered the development of large-area scintillator arrays. Thanks to the presence of heavy atoms, solution-grown
M. Birowosuto   +6 more
semanticscholar   +1 more source

Leveraging Geodetic GPS Receivers for Ionospheric Scintillation Science

open access: yesRadio Science, 2020
We demonstrate scintillation analysis from a network of geodetic Global Positioning System (GPS) receivers which provide data at 1‐second resolution. We introduce proxy phase (σTEC) and amplitude (SNR4) scintillation indices and validate them against the
S. Mrak   +5 more
semanticscholar   +1 more source

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