Results 91 to 100 of about 34,661 (210)

An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]

, 2005
International audienceWhen the Earth's ionosphere is irradiated by a radiofrequency (RF) electromagnetic wave of sufficiently high power density and tuned to match a natural E- or F-region plasma frequency, ionospheric magnetoionic wave modes may be ...
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., Belyey, Tereshchenko, Tereshchenko, E., Khudukon, B., Rietveld, M., Hoz, C. La, Belyey, Vasyl, Tereshchenko, E.D., Hagfors, Yurik, R. Yu., Khudukon, Yu. Yurik, Heinselman, C., Grill, Brekke, Belyey, V., Isham, B., Rietveld, Hagfors, T., Heinselman, Brekke, Asgeir, Rietveld, M. T., La Hoz, C., Isham, null La Hoz, Grill, M., Yurik, Yu., null null, Yurik, R. Yu., Yurik, R., La Hoz, Cesar, Tereshchenko, E. D., La Hoz   +36 more
core   +1 more source

Recurrent and sporadic Forbush decreases during solar cycles 23–24

Solar-Terrestrial Physics, 2019
A comparison has been made between recurrent (associated with high-speed streams from coronal holes) and sporadic (caused by interplanetary coronal mass ejections (ICMEs)) Forbush decreases (FDs) in solar cycles 23 and 24 (as well as in the maxima of ...
Melkumyan A.A., Belov A.V., Abunina M.A., Abunin A.A., Eroshenko E.A., Oleneva V.A., Yanke V.G.   +6 more
doaj   +1 more source

A PLL-Based Doppler Method Using an SDR-Receiver for Investigation of Seismogenic and Man-Made Disturbances in the Ionosphere

Geosciences
The article describes in detail the equipment and method for measuring the Doppler frequency shift (DFS) on an inclined radio path, based on the principle of the phase-locked loop using an SDR receiver for the investigation of seismogenic and man-made ...
Nazyf Salikhov, Alexander Shepetov, Galina Pak, Vladimir Saveliev, Serik Nurakynov, Vladimir Ryabov, Valery Zhukov   +6 more
doaj   +1 more source

Barometric effect of neutron component of cosmic rays at Antarctic station «Mirny»

Solar-Terrestrial Physics, 2016
The barometric effect of cosmic ray neutron component was estimated on the example of the Antarctic station Mirny. We used hourly data from continuous monitoring of neutron component and data from a local weather station for 2007–2014.
Kobelev P.G., Аbunin А.А., Аbunina M.А., Preobrazhensky M.S., Smirnov D.V., Lukovnikova А.А.   +5 more
doaj   +1 more source

Effects of a mid-latitude solar eclipse on the thermosphere and ionosphere - A modelling study

, 1998
A modelling study is presented which investigates in-situ generated changes of the thermosphere and ionosphere during a solar eclipse. Neutral temperatures are expected to drop by up to 40 degrees K at 240 km height in the totality footprint, with ...
Aylward, A. D., Muller-Wodarg, ICF, Müller-Wodarg, I. C. F., Aylward, AD, Lockwood, M, Lockwood M, Lockwood, Mike, Aylward AD, MullerWodarg ICF   +8 more
core   +1 more source

Integrated Numerical Modeling of Dam Breach: Breach Formation, Reservoir Drawdown, and Impact on Downstream Small Dams

Applied Sciences
This study presents a comprehensive numerical simulation of reservoir dam failure based on the two-dimensional hydrodynamic model MIKE 21. To reproduce the real accident process, a detailed digital elevation model derived from LiDAR survey data was ...
Larissa Balakay, Oxana Kuznetsova, Tatyana Dedova, Nataliya Tusseyeva, Madiyar Sarybayev   +4 more
doaj   +1 more source

Correction of ionospheric distortions in low frequency interferometric SAR data

, 2011
In this paper we propose some ionospheric correction schemes for space-borne synthetic aperture radar (SAR) and polarimetric interferometric SAR (PolInSAR).
Jun Su Kim, Andreas Danklmayer, Konstantinos Papathanassiou, Kim, Jun Su, Danklmayer, Andreas, Papathanassiou, Konstantinos   +5 more
core   +1 more source

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 ...
Milan, S. E., Stolle, Claudia, H. Gleisner (7605608), V. Angelopoulos (7161083), Grocott, A., A. Grocott (7601519), C. Stolle (7605611), Angelopoulos, V., Stolle, C., O. Amm (7591346), J. M. Weygand (7605605), Weygand, J. M., Amm, O., S. E. Milan (7594526), Gleisner, H.   +14 more
core   +1 more source

InSAR-Based Assessment of Land Subsidence Induced by Coal Mining in Karaganda, Kazakhstan

Geomatics
The objective of this study is to quantify and characterize ground deformations induced by underground coal mining in the Karaganda coal basin, Kazakhstan, in order to improve the understanding of subsidence processes and their long-term evolution.
Assel Satbergenova, Dinara Talgarbayeva, Andrey Vilayev, Asset Urazaliyev, Alena Yelisseyeva, Azamat Kaldybayev, Semen Gavruk   +6 more
doaj   +1 more source

Ionospheric Response to the Extreme Geomagnetic Storm of 10–11 May 2024 Based on Total Electron Content Observations in the Central Asian and East Asian Regions

Atmosphere
The ionospheric response to the major geomagnetic storm (SYM-H = −518 nT) of 10–11 May 2024 was investigated using total electron content (TEC) observations from the Central Asian (CAR) and East Asian (EAR) regions.
Galina Gordiyenko, Feza Arikan, Yuriy Litvinov, Murat Zhiganbaev   +3 more
doaj   +1 more source