Results 11 to 20 of about 86,535 (196)

Ionospheric plasma irregularities studied with Swarm satellites

E3S Web of Conferences, 2018
To study and characterise the ionospheric plasma irregularities at all latitudes, one can employ in-situ measurements by satellites in polar orbits, such as the European Space Agency’s Swarm mission.
Miloch Wojciech J., Jin Yaqi, Xiong Chao, Kervalishvili Guram, Spicher Andres, Clausen Lasse B.N., Stolle Claudia   +6 more
doaj   +3 more sources

Artificial periodic irregularities in the auroral ionosphere [PDF]

, 1996
International audienceArtificial periodic irregularities (API) are produced in the ionospheric plasma by a powerful standing electromagnetic wave reflected off the F region.
N. P. Goncharov, Pollari, P., Goncharov, N.P., Matveinen, H., E. Turunen, H. Matveinen, P. Pollari, Rietveld, M., M. T. Rietveld, Turunen, E., Goncharov, N. P., Goncharov, N., Rietveld, M.T.   +12 more
core   +6 more sources

Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities [PDF]

, 2004
International audienceWe present radar backscatter power measurements using the CUTLASS HF radar at Hankasalmi, Finland from F-region field-aligned irregularities induced by HF radio pumping with the EISCAT Heating facility.
A. Senior, Rietveld, Michael T., Kosch, M.J., Borisov, N. D., Honary, F., Rietveld, M. T., Senior, A., T. K. Yeoman, Borisov, N.D., M. T. Rietveld, Kosch, M. J., M. J. Kosch, F. Honary, Yeoman, T. K., N. D. Borisov, Yeoman, T.K.   +15 more
core   +6 more sources

Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays [PDF]

, 2012
Equivalent ionospheric currents obtained with the spherical elementary current systems (SECS) method and derived from nearly 100 ground magnetometers spread over North America and Greenland are compared with ionospheric flow vectors measured by the ...
Angelopoulos, V., Stolle, C., Milan, S. E., Weygand, J. M., Amm, O., Grocott, A., Gleisner, H.   +6 more
core   +5 more sources

Measurements and simulation of ionospheric scattering on VHF and UHF radar signals : coherence times, coherence bandwidths and S4 [PDF]

, 2009
Irregularities in the electron density of the ionosphere cause phase and amplitude scintillation on transionospheric VHF and UHF radar signals, particularly at lower radio frequencies.
Cannon, Paul, Groves, Keith, Rogers, Neil   +2 more
core   +5 more sources

Numerical simulation of the propagation of electromagnetic waves in ionospheric irregularities

Earth and Planetary Physics, 2020
The characteristics of high-frequency (HF) electromagnetic (EM) wave propagation can be affected when EM waves propagate in the ionosphere. When ionospheric irregularities appear in the ionosphere, they can have a serious impact on the propagation of HF ...
ChunHua Jiang, LeHui Wei, GuoBin Yang, Chen Zhou, ZhengYu Zhao   +4 more
doaj   +1 more source

Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism

Space Weather, 2022
The impacts of ionospheric irregularities on precise point positioning (PPP) have been commonly noticed in the field of the ionosphere and the precise application of the Global Navigation Satellite System.
Wei Li, Shuli Song, Weili Zhou, Na Cheng, Chao Yu   +4 more
doaj   +1 more source

The dependence of the Irregularity Parameter Characterizing the Equatorial Ionospheric Irregularities on the background Ionospheric Density

Journal of Nepal Physical Society, 2021
The low-latitude ionosphere is characterized by large-scale instabilities in the post-sunset hours due to the distinct geometry of the earth’s magnetic field lines at the equator. The magnetic field lines are horizontal at the equator contributing to the high vertical drift velocity of the plasma bubbles growing from the bottomside of the ionospheric F-
J. Retterer, K. Groves, D. Joshi
openaire   +2 more sources

Review of ionospheric irregularities and ionospheric electrodynamic coupling in the middle latitude region

Earth and Planetary Physics, 2021
This paper briefly reviews ionospheric irregularities that occur in the E and F regions at mid-latitudes. Sporadic E (ES) is a common ionospheric irregularity phenomenon that is first noticed in the E layer.
Yi Liu, Chen Zhou, Tong Xu, Qiong Tang, ZhongXin Deng, GuanYi Chen, ZhuangKai Wang   +6 more
doaj   +1 more source

Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]

, 2003
In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T., Kosch, Mike J., Leyser, T. B., Blagoveshchenskaya, N. F., Kornienko, V. A., Yeoman, T. K.   +5 more
core   +5 more sources