Results 151 to 160 of about 187,706 (222)

Satellite Positioning: Performances under Ionospheric Scintillations

, 2013
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Turbulence signatures in high--latitude ionospheric scintillation

Journal of Geophysical Research: Space Physics, 2022
AbstractGround‐based amplitude measurements of Global Navigation Satellite System signal during ionospheric scintillation are analyzed using prevalent data analysis tools developed in the fields of fluid and plasma turbulence. One such tool is the structure function of order q, with q = 1 to q = 6, which reduces to the computation of the second‐order ...
K. Meziane, A. M. Hamza, P. T. Jayachandran   +2 more
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Ionospheric Scintillation Monitoring With ROTI From Geodetic Receiver: Limitations and Performance Evaluation

Radio Science, 2022
By comparing amplitude scintillation index S4 from scintillation receivers and Rate of change of Total electron content Index (ROTI) from nearby geodetic receivers in low latitude region of China during year 2015, this work summarized the limitations of ...
Wei Li, Shuli Song, Xulei Jin
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Correcting and Measuring Ionospheric Scintillation Amplitude Stripes in L-Band SAR Images

IEEE Geoscience and Remote Sensing Letters, 2022
The amplitude stripes induced by the ionospheric scintillation have been frequently observed in spaceborne L-band synthetic aperture radar (SAR) images, such as advanced land observing satellite (ALOS) phased array-type L-band SAR (PALSAR), which may ...
Nan Gan, Yifei Ji, Feixiang Tang, Yongsheng Zhang, Z. Dong   +4 more
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Automatic Detection of GNSS Ionospheric Scintillation Based on Extreme Gradient Boosting Technique

IEEE Geoscience and Remote Sensing Letters, 2021
Ionospheric scintillations caused by the ionospheric plasma density irregularities adversely affect the positional accuracy of the global navigation satellite system (GNSS) receiver.
Abhijit Dey, Manhal Rahman, D. Ratnam, Nikhil Sharma   +3 more
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Examining the Tolerance of GNSS Receiver Phase Tracking Loop Under the Effects of Severe Ionospheric Scintillation Conditions Based on Its Bandwidth

Radio Science, 2021
This study aims to evaluate the performance of phase‐locked loop (PLL) under the presence of distinct scintillation patterns in the signal. Scintillation is very common in low‐latitude regions due to the ionospheric dynamics.
Igor Ponte Portella, Alison de O. Moraes, Marcelo da Silva Pinho, J. Sousasantos, F. Rodrigues   +4 more
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Ionospheric scintillations

Radio Science, 1983
A renormalization technique, employed in the spirit of the formal theory of scattering, is applied to the problem of ionospheric scintillations. In the forward scattering limit, using a Markov approximation for ionospheric fluctuations and renormalized moment equations, one derives the wave statistics for a plane wave or beam propagating through the ...
D. M. Wu, N. Marcuvitz
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Auroral E‐Region as a Source Region for Ionospheric Scintillation

Journal of Geophysical Research: Space Physics, 2021
Altitudinal source regions and generation mechanisms of ionospheric scintillation are investigated by employing the incoherent scatter radar (ISR) at Poker Flat, Alaska (PFISR) and nearby global positioning system (GPS) receivers.
R. Makarevich, Geoffrey Crowley, I. Azeem, C. Ngwira, V. Forsythe   +4 more
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Ionospheric irregularities and scintillation

Advances in Space Research, 2003
Abstract One of the important research objectives of the Space Weather Program is to understand the structure and formation of ionospheric plasma-density irregularities that cause scintillation of radio waves on transionospheric links. In this paper we briefly review some aspects of scintillation and irregularities: the relationship between ...
A.W. Wernik, J.A. Secan, E.J. Fremouw
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High latitude ionospheric scintillations

Canadian Journal of Physics, 1984
The statistical characteristics of ionospheric irregularities are often described by specifying one or two of the statistical parameters of the scintillations that the irregularities produce in satellite radio signals. The most commonly used parameter for this purpose is the spectral index (slope of the power spectral density function on a log–log ...
J. A. Fulford, P. A. Forsyth
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