Results 171 to 180 of about 187,706 (222)

Spectra of ionospheric scintillation

Journal of Geophysical Research, 1976
Observations of amplitude and phase scintillation were made at the Millstone Hill radar facility by using phase coherent sources at 150 and 400 MHz on the U.S. Navy navigation system satellites. These observations have been processed to yield power spectra of the fluctuations in the logarithm of the received power (log power) at each frequency and the ...
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Multifrequency studies of ionospheric scintillations

Radio Science, 1977
Simultaneous scintillation data from the ATS‐6 Radio Beacon Experiments for signals at 40, 140, and 360 MHz offer the opportunity to study the frequency dependence of the scintillation phenomenon. Using these data variations of the spectral index, correlation coefficient, and the correlation interval are investigated.
R. Umeki, C. H. Liu, K. C. Yeh
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Dependencies of GPS Scintillation Indices on the Ionospheric Plasma Drift and Rate of Change of TEC Around the Dawn Sector of the Polar Ionosphere

Journal of Geophysical Research: Space Physics, 2022
The dependencies of global positioning system (GPS) scintillation indices on ionospheric plasma flow and the rate of change of total electron content (TEC) around the dawn sector for the first time of the polar ionosphere are investigated.
Yong Wang, P. Jayachandran, Y. Ma, Q. Zhang, Zanyang Xing, J. Ruohoniemi, S. Shepherd, M. Lester   +7 more
semanticscholar   +1 more source

Algorithm of Ionospheric Scintillation Monitoring

2018 7th International Conference on Digital Home (ICDH), 2018
With the development of the Beidou satellite navigation system, the monitoring of ionospheric scintillation combined with GPS and Beidou system has become a trend. In this paper, the design and implementation of the upper computer software for ionospheric scintillation monitoring are introduced, and the related algorithms such as ionospheric amplitude ...
Xiyan Sun, Zheyang Zhang, Yuanfa Ji, Suqing Yan, Wentao Fu, Qidong Chen   +5 more
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Ionospheric irregularities and radio scintillations

Contemporary Physics, 1975
(1975). Ionospheric irregularities and radio scintillations. Contemporary Physics: Vol. 16, No. 5, pp. 469-488.
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Power spectra of ionospheric scintillations

Journal of Atmospheric and Terrestrial Physics, 1974
Abstract The diffraction theory of interplanetary scintillations, which allows a connection to be established between the spatial spectrum of electron-density fluctuations in the irregular medium and the power spectrum of intensity scintillations observed on the ground, is reviewed and applied to the case of the ionosphere.
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Quasiperiodic scintillation in the ionosphere

Journal of Atmospheric and Terrestrial Physics, 1972
Abstract The hypothesis is advanced that a regular cyclic type of fading seen occasionally on chart recordings of HF and VHF radio frequency signals that have penetrated the ionosphere is a special case of the more normal irregular ionospheric scintillation.
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Phase scintillations at the polar ionosphere

2013 IEEE International Conference on Space Science and Communication (IconSpace), 2013
A dual-frequency GPS Ionospheric Scintillation and TEC Monitor (GISTM) receiver, GSV4004B, has been installed at Alert, Canada (82.48° N, 297.75° E, corresponding to 86.95° N, 155.77° E geomagnetic coordinate) since May 2008 to study the ionospheric variability at a high-latitude location.
M.J. Homam, E.M. Warrington, A.J. Stocker   +2 more
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Investigating Ionospheric Scintillation Effects on Multifrequency GPS Signals

Surveys in geophysics, 2021
L. A. Salles, B. Vani, A. Moraes, E. Costa, E. D. de Paula   +4 more
semanticscholar   +1 more source

Satellite‐Beacon Ionospheric‐Scintillation Global Model of the Upper Atmosphere (SIGMA) III: Scintillation Simulation Using A Physics‐Based Plasma Model

Geophysical Research Letters, 2019
Electromagnetic signals including Global Navigation Satellite Systems (GNSS) signals often experience fluctuations due to ionospheric density structures termed as scintillation.
K. Deshpande, M. Zettergren
semanticscholar   +1 more source