Results 11 to 20 of about 187,706 (222)

Characteristics of ionospheric scintillation climatology over Indian low-latitude region during the 24th solar maximum period

Geodesy and Geodynamics, 2019
The amplitude and phase of L-band satellite signals are fluctuated randomly due to small scale electron density irregularity structures in the ionosphere which result in fleeting variations, known as ‘ionospheric scintillations’.
K. Sahithi, M. Sridhar, Sarat K. Kotamraju, K.Ch. Sri Kavya, G. Sivavaraprasad, D.Venkata Ratnam, Ch. Deepthi   +6 more
doaj   +2 more sources

Categorizing Characteristic Regions of High‐Latitude Scintillations Using a Combination of Isolation Forest and Neural Network Machine Learning Algorithms

Journal of Geophysical Research: Machine Learning and Computation
Global Positioning System (GPS) scintillations are radio signal fluctuations due to ionospheric structures or irregularities. In this work, we utilize scintillation data to identify the source region (auroral oval vs.
Chintan Thakrar, Nicolas Gachancipa, Kshitija Deshpande, Anna‐Marie Bals, Larry Paxton   +4 more
doaj   +2 more sources

A measurement of small-scale features using ionospheric scintillation. Comparison with refractive shift measurements [PDF]

Publications Astronomical Society of Australia, 2022
We present a study of scintillation induced by the mid-latitude ionosphere. By implementing methods currently used in Interplanetary Scintillation studies to measure amplitude scintillation at low frequencies, we have proven it is possible to use the ...
A. Waszewski, J. Morgan, C. Jordan
semanticscholar   +1 more source

Towards the possibility to combine LOFAR and GNSS measurements to sense ionospheric irregularities

Journal of Space Weather and Space Climate, 2023
Inhomogeneities within the ionospheric plasma density affect trans-ionospheric radio signals, causing radio wave scintillation in the amplitude and phase of the signals.
Flisek Paweł, Forte Biagio, Fallows Richard, Kotulak Kacper, Krankowski Andrzej, Bisi Mario, Mevius Maaijke, Froń Adam, Tiburzi Caterina, Soida Marian, Śmierciak Bartosz, Grzesiak Marcin, Matyjasiak Barbara, Pożoga Mariusz, Dąbrowski Bartosz, Mann Gottfried, Vocks Christian, Zucca Pietro, Błaszkiewicz Leszek   +18 more
doaj   +1 more source

A Preliminary Study on Ionospheric Scintillation Anomalies Detected Using GNSS-R Data from NASA CYGNSS Mission as Possible Earthquake Precursors

Remote Sensing, 2022
Ionospheric perturbations affect the propagation of electromagnetic waves. These perturbations, besides being a problem for space communications, satellite navigation, and Earth observation techniques, could also be used as another Earth observation tool.
Carlos Molina, Badr-Eddine Boudriki Semlali, Hyuk Park, Adriano Camps   +3 more
semanticscholar   +1 more source

Climatology of GPS phase scintillation and HF radar backscatter for the high-latitude ionosphere under solar minimum conditions [PDF]

Annales Geophysicae, 2011
Maps of GPS phase scintillation at high latitudes have been constructed after the first two years of operation of the Canadian High Arctic Ionospheric Network (CHAIN) during the 2008–2009 solar minimum.
P. Prikryl, P. T. Jayachandran, S. C. Mushini, R. Chadwick   +3 more
doaj   +1 more source

Automatic GNSS Ionospheric Scintillation Detection with Radio Occultation Data Using Machine Learning Algorithm

Applied Sciences, 2023
Ionospheric scintillation often occurs in the polar and equator regions, and it can affect the signals of the Global Navigation Satellite System (GNSS).
Guangwang Ji, Ruimin Jin, Weimin Zhen, Huiyun Yang   +3 more
doaj   +1 more source

Climatology of GPS ionospheric scintillations over high and mid-latitude European regions [PDF]

Annales Geophysicae, 2009
We analyze data of ionospheric scintillation in the geographic latitudinal range 44°–88° N during the period of October, November and December 2003 as a first step to develop a "scintillation climatology" over Northern Europe.
L. Spogli, L. Alfonsi, G. De Franceschi, V. Romano, V. Romano, M. H. O. Aquino, A. Dodson   +6 more
doaj   +1 more source

GPS and ionospheric scintillations [PDF]

Space Weather, 2007
Ionospheric scintillations are one of the earliest known effects of space weather. Caused by ionization density irregularities, scintillating signals change phase unexpectedly and vary rapidly in amplitude. GPS signals are vulnerable to ionospheric irregularities and scintillate with amplitude variations exceeding 20 dB. GPS is a weak signal system and
P. M. Kintner, B. M. Ledvina, E. R. de Paula   +2 more
openaire   +1 more source

Analysis on the ionospheric scintillation monitoring performance of ROTI extracted from GNSS observations in high-latitude regions

Advances in Space Research, 2021
Monitoring ionospheric scintillation on a global scale requires introducing a network of widely distributed geodetic receivers, which call for a special type of scintillation index due to the low sampling rate of such receivers.
Dongsheng Zhao, Wang Li, Chendong Li, C. Hancock, G. Roberts, Qianxin Wang   +5 more
semanticscholar   +1 more source