Results 11 to 20 of about 35,657 (302)

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

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   +6 more sources

Study of GNSS Loss of Lock Characteristics under Ionosphere Scintillation with GNSS Data at Weipa (Australia) During Solar Maximum Phase

open access: yesSensors, 2017
One of the adverse impacts of scintillation on GNSS signals is the loss of lock status, which can lead to GNSS geometry and visibility reductions that compromise the accuracy and integrity of navigation performance.
Yang Liu   +3 more
doaj   +4 more sources

Scintillation characteristics of chemically processed Ce:GAGG single crystals [PDF]

open access: yesPLoS ONE, 2023
We investigated the correlation between the surface finish and luminescence properties of chemically polished cerium-doped single-crystal Gd3Al2Ga3O12 scintillators (Ce:GAGG), from the crystallographic perspective.
Chansun Park   +6 more
doaj   +3 more sources

Multi-Frequency Simulation of Ionospheric Scintillation Using a Phase-Screen Model

open access: yesNavigation, 2022
A fast Monte Carlo technique to simulate equatorial ionospheric scintillation on global navigation satellite system signals is proposed. The algorithm uses a single-layer phase-screen model of the ionosphere and the scintillation is expressed as a ...
Fernando D. Nunes   +2 more
doaj   +1 more source

Observations and modeling of scintillation in the vicinity of a polar cap patch

open access: yesJournal of Space Weather and Space Climate, 2022
Small-scale ionospheric plasma structures can cause scintillation in radio signals passing through the ionosphere. The relationship between the scintillated signal and how plasma structuring develops is complex.
Lamarche Leslie J.   +2 more
doaj   +1 more source

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

open access: yesAtmospheric Measurement Techniques, 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 ...
E. Shume, C. Ao
doaj   +1 more source

Requirements of Scintillation Crystals with the Development of PET Scanners

open access: yesCrystals, 2022
Positron emission tomography (PET) is widely used in the diagnosis of tumors, cardiovascular system diseases, and neurological diseases. Scintillation crystals are an important part of PET scanners; they can convert γ photons into fluorescent photons to ...
Xin Yu   +7 more
doaj   +1 more source

Flexible composite scintillators based on ZnWO4 micro- and nanopowders [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2019
Nano-sized and micro-sized ZnWO4 powders were obtained by different methods: hydrothermal synthesis with microwave heating, molten salt method, solid-state synthesis and сrushing of bulk crystals.
Tinkova V. S.   +5 more
doaj   +3 more sources

COMPUTER SIMULATION OF GAMMA-RAY DETECTOR BASED ON SCINTILLATION CRYSTALS AND SILICON PHOTOMULTIPLIERS [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2018
Subject of Research. The paper considers the principles of realization of the gamma-radiation detector based on a silicon photoelectron multiplier and a scintillation crystal with the use of an optical matching scheme. Method.
Bokatyi I.O.   +5 more
doaj   +1 more source

Light Yield Response of Neutron Scintillation Screens to Sudden Flux Changes

open access: yesJournal of Imaging, 2020
We performed a study of the initial and long term light yield of different scintillation screen mixtures for neutron imaging during constant neutron irradiation.
Tobias Neuwirth   +3 more
doaj   +1 more source

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