Results 91 to 100 of about 42,321 (217)

Automatic ionospheric scintillation detector for global navigation satellite system receivers

, 2015
Severe ionosphere scintillations have been known to affect the performance and measurement accuracy of Global Navigation Satellite System (GNSS) receivers. The scintillation in signal amplitude and phase reduces the number of available GNSS satellites by
Sivavaraprasad, Gampala, Lee, Jiyun, Ratnam, Devanaboyina Venkata   +2 more
core   +1 more source

HF Heating Effects as Seen From Below and Above: First Results of Joint SURA–Ionosfera‐M Experiment

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract This paper presents the first results of a coordinated experiment on the ionospheric plasma response to high‐frequency (HF) overdense heating, conducted using the SURA heating facility and the Ionosfera‐M satellite. The experiment combined ground‐based observations with in situ satellite measurements, enabling a comprehensive study of ...
A. A. Chernyshov, A. M. Padokhin, S. M. Grach, D. A. Kogogin, A. V. Shindin, S. A. Pulinets, I. A. Nasyrov, A. B. Beletsky, I. D. Tkachev, J. K. Legostaeva, D. V. Chugunin, M. A. Evdokimova, G. A. Kurbatov, K. G. Tsybulya, A. E. Solin, A. V. Shchennikov, E. V. Tareeva, V. V. Emelyanov, M. M. Mogilevsky   +18 more
wiley   +1 more source

Life-time of ionospheric scintillations from multi-satellite radio transmission recordings

, 1975
Amplitude recordings from five U.S. Navy Navigational Satellites (NNSS), at a frequency of 150 MHz, were used to estimate the life-time of scintillation producing ionization patches in the F-region. The median life-time of scintillations, which was found
Hajkowicz, L.A
core   +1 more source

Analysis of ionospheric scintillations for Portugal related to atmospheric and space weather forcings. Summer project - Student report.

, 2022
Solar and geomagnetic activity (space weather, SW) as well as such atmospheric events as severe storms and hurricanes and sudden stratospheric warmings (SSW) are the main drivers of ionospheric disturbances including ionospheric scintillations ...
Inês Oliveira (13892078), Anna Morozova (572204)   +1 more
core   +1 more source

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. The variance and thecorrelation function are calculated for arbitrary 3D spectralfunction of electron density fluctuations containing bothanisotropic ...
Jandieri, George, Ishimaru, Akira, Rawat, Banmali, Kharshiladze, Oleg, Diasamidze, Zhuzhuna   +4 more
openaire   +4 more sources

ISNet: Decomposed Dynamic Spatio‐Temporal Neural Network for Ionospheric Scintillation Forecasts

Space Weather
Accurate prediction of ionospheric scintillation is essential for ensuring the reliability of spaceborne and ground‐based radio wave technology infrastructures, including but not limited to navigation and communication systems.
Zhixu Gao, Yanhong Chen, Xianzhi Ao, Fulu Yue, Hong Chen, Hao Deng, Bingxian Luo, Xin Wang, Tianjiao Yuan   +8 more
doaj   +1 more source

Application of an imaging HF riometer for the observation of scintillations of discrete cosmic sources

, 2008
Scintillations of discrete cosmic radio sources have been investigated theoretically and experimentally for radiation scattered from natural and artificial inhomogeneities in the auroral zone ionosphere.
A. S. Kashcheyev, Kashcheyev, A. S.; id_orcid, B. J. Watkins, Groves, K., Bezrodny, V. G., Charkina, O. V., K. Groves, Murayama, Y., Y. Murayama, O. V. Charkina, Yampolski, Y. M., V. G. Bezrodny, Galushko, V. G., Watkins, B. J., V. G. Galushko, Y. M. Yampolski   +15 more
core   +1 more source

First Observations of GNSS Ionospheric Scintillations From DemoGRAPE Project

, 2016
The Istituto Nazionale di Geofisica e Vulcanologia leads an international project funded by the Italian National Program for Antarctic Research, called Demonstrator of Global Navigation Satellite System (GNSS) Research and Application for Polar ...
Cilliers, P. J., Linty, N., Riley, P., Alfonsi, Lucilla, Romano, V., Ruiu, P., Romano, Vincenzo, Hunstad, Ingrid, Correia, E., Ward, J., Dovis, F., Terzo, O., Alfonsi, L., Hunstad, I., Terzo O., Cilliers P. J., DOVIS, Fabio, Ward J., Riley P., Romano V., Alfonsi L., Linty N., TERZO, OLIVIER, Correia E., Dovis F., LINTY, NICOLA UMBERTO, RUIU, PIETRO, Ruiu P., Hunstad I.   +28 more
core   +2 more sources

Cycle Slip Detection during High Ionospheric Activities Based on Combined Triple-Frequency GNSS Signals

Remote Sensing, 2019
The current cycle slip detection methods of Global Navigation Satellite System (GNSS) were mostly proposed on the basis of assuming the ionospheric delay varying smoothly over time. However, these methods can be invalid during active ionospheric periods,
Dongsheng Zhao, Craig M. Hancock, Gethin Wyn Roberts, Shuanggen Jin   +3 more
doaj   +1 more source

Radio transmissions from two satellites as a possible cause of quasiperiodic scintillations in amplitude recordings

, 1974
A number of reports have been written on the occurrence and causes of regular fadings, or quasiperiodic (QP) scintillations, in amplitude and phase of satellite radio-transmissions in the VHF range. QP scintillations have been associated with the E- or F-
Hajkowicz, L. A.
core   +1 more source