Results 1 to 10 of about 2,679 (211)

Role of the magnetospheric and ionospheric currents in the generation of the equatorial scintillations during geomagnetic storms [PDF]

Annales Geophysicae, 2004
The equatorial ionosphere parameters, Kp, Dst, AU and AL indices characterized contribution of different magnetospheric and ionospheric currents to the H-component of geomagnetic field are examined to test the geomagnetic activity effect on the ...
L. Z. Biktash
doaj   +13 more sources

Broadband Meter-Wavelength Observations of Ionospheric Scintillation [PDF]

Journal of Geophysical Research: Space Physics, 2015
Intensity scintillations of cosmic radio sources are used to study astrophysical plasmas like the ionosphere, the solar wind, and the interstellar medium. Normally these observations are relatively narrow band. With Low Frequency Array (LOFAR) technology
Brentjens, M., Coles, W. A., de Reijer, J-P., Ebbendorf, N., Enell, C-F., Fallows, R. A., Gerbers, M., Grit, T., Gruppen, P., Iinatti, T., Kero, A., Lehtinen, M., McKay, D., Meulman, H., Norden, M., Orispää, M., Postila, M., Raita, T., Roininen, L., Schoenmakers, A., Stuurwold, K., Turunen, E., Ulich, Th., Vierinen, J., Virtanen, I. I.   +24 more
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Observations of GPS ionospheric scintillations over Wuhan during geomagnetic storms [PDF]

Annales Geophysicae, 2006
During the two geomagnetic storms which occurred on 1 October 2002 and 22 January 2004, the strong ionospheric scintillations of the GPS L1 band were observed at Wuhan station (30.6° N, 114.4° E, 45.8° Dip), which is ...
G. Li, G. Li, G. Li, B. Ning, W. Wan, B. Zhao, B. Zhao, B. Zhao   +7 more
doaj   +5 more sources

A Review of Ionospheric Scintillation Models. [PDF]

Surv Geophys, 2015
This is a general review of the existing climatological models of ionospheric radio scintillation for high and equatorial latitudes. Trans-ionospheric communication of radio waves from transmitter to user is affected by the ionosphere which is highly variable and dynamic in both time and space. Scintillation is the term given to irregular amplitude and
Priyadarshi S.
europepmc   +4 more sources

Pembangunan pembelajaran mobile dalam kejuruteraan [PDF]

2013 IEEE International Conference on Space Science and Communication (IconSpace), 2016
Perkembangan pembelajaran mobile hari ini memberi peluang untuk teknologi mobile dan teknologi Computer Aided Design (CAD) diintegrasikan dalam proses reka bentuk.
Ismail, Irwan Mahazir
core   +2 more sources

Power Spectra of Ionospheric Scintillations

Advanced Electromagnetics, 2017
Second order statistical moments of the phase fluctuationsare obtained taking into account the boundary condition,diffraction effects and polarization coefficients of theordinary and extraordinary waves.
G. V. Jandieri, A. Ishimaru, B. Rawat, O. Kharshiladze, Z. Diasamidze   +4 more
doaj   +4 more sources

Faraday polarization fluctuations and their dependence on post sunset secondary maximum and amplitude scintillations at Delhi [PDF]

Annales Geophysicae, 2002
VHF Faraday rotation (FR) and amplitude scintillation data recorded simultaneously during May 1978–December 1980 at Delhi (28.63° N, 77.22° E; Dip 42.44° N) is analyzed in order to study the Faraday polarization fluctuations (FPFs) and their ...
J. K. Gupta, J. K. Gupta, L. Singh, R. S. Dabas   +3 more
doaj   +3 more sources

Discovery of Regular Daily Ionospheric Scintillation

Atmosphere
The aim of this study was to find out whether, just like in March 2015, daily regular GPS positioning disturbances caused by ionospheric scintillations occurred in other months of the solar activity cycle 24.
Janis Balodis, Madara Normand, Ingus Mitrofanovs   +2 more
doaj   +2 more sources

Ionospheric Scintillation Prediction on S4 and ROTI Parameters Using Artificial Neural Network and Genetic Algorithm

Remote Sensing, 2021
Irregularities in electron density usually correlate with ionospheric plasma perturbations. These variations causing radio signal fluctuations, in response, generate ionospheric scintillations that frequently occur in low-latitude regions.
Alireza Atabati, Mahdi Alizadeh, Harald Schuh, Lung-Chih Tsai   +3 more
doaj   +1 more source

Machine learning approach for prediction of total electron content and classification of ionospheric scintillations over Visakhapatnam region

AIP Advances, 2023
Ionospheric scintillations, which are due to ionospheric plasma density anomalies, negatively impact trans-ionospheric signals and the positioning accuracy of the global navigation satellite system (GNSS).
Shiva Kumar Nimmakayala, Srilatha Indira Dutt V.B.S   +1 more
doaj   +1 more source