Search Results - "Keskinen, M J"

New Model for Ionospheric Irregularities at Mars by Keskinen, M. J.

“…A new model for ionospheric irregularities at Mars is presented. It is shown that wind‐driven currents in the dynamo region of the Martian ionosphere can be…”
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Equatorial ionospheric bubble precursor by Keskinen, M. J.

“…A time‐dependent nonlinear three‐dimensional model for the evolution of the equatorial bottomside lower ionosphere in the presence of dissipating gravity waves…”
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Three-dimensional nonlinear evolution of equatorial ionospheric bubbles with gravity wave seeding and tidal wind effects by Keskinen, M. J., Vadas, Sharon L.

“…The three‐dimensional nonlinear evolution of equatorial ionospheric bubbles, using a realistic lower atmospheric gravity wave source, has been computed. It is…”
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Response of the equatorial ionosphere in the South Atlantic Region to the Great Magnetic Storm of July 15, 2000 by Basu, S., Basu, Su, Groves, K. M., Yeh, H.‐C., Su, S.‐Y., Rich, F. J., Sultan, P. J., Keskinen, M. J.

“…The effects of the great magnetic storm of July 15, 2000 on the equatorial ionosphere have been studied by ground‐based and satellite in‐situ measurements. A…”
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Near-simultaneous plasma structuring in the midlatitude and equatorial ionosphere during magnetic superstorms by Basu, S., Basu, Su, Groves, K. M., MacKenzie, E., Keskinen, M. J., Rich, F. J.

“…Near simultaneous formation of ionospheric plasma density structures at middle and equatorial latitudes during the intense magnetic storms of October 29–31,…”
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Three-dimensional nonlinear evolution of equatorial ionospheric spread-F bubbles by Keskinen, M. J., Ossakow, S. L., Fejer, B. G.

“…Using numerical simulation techniques, we present the first study of the three‐dimensional nonlinear evolution of an equatorial spread‐F bubble. The background…”
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Midlatitude sub-auroral ionospheric small scale structure during a magnetic storm by Keskinen, M. J., Basu, S., Basu, Santimay

“…We develop a model for small scale structure in the midlatitude sub‐auroral polarization stream (SAPS)‐driven density trough ionosphere during a magnetic…”
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Evolution of equatorial ionospheric bubbles during a large auroral electrojet index increase in the recovery phase of a magnetic storm by Keskinen, M. J., Ossakow, S. L., Fejer, B. G., Emmert, John

“…We present a model and observations of the evolution of equatorial ionospheric bubbles during a large auroral electrojet (AE) index increase in the recovery…”
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Correction to "Three-dimensional nonlinear evolution of equatorial ionospheric bubbles with gravity wave seeding and tidal wind effects" by Vadas, Sharon L., Keskinen, M. J.

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GPS scintillation channel model for the disturbed low-latitude ionosphere by Keskinen, M. J.

“…A Global Positioning System (GPS) scintillation channel model for the disturbed low‐latitude ionosphere is developed by combining first‐principles…”
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Thermal self-focusing instability in the high-latitude ionosphere by Keskinen, M. J., Basu, Santimay

“…A model for the linear theory of the overdense thermal self‐focusing instability, as generated by high power radio waves, in the high‐latitude F‐region…”
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Two components of ionospheric plasma structuring at midlatitudes observed during the large magnetic storm of October 30, 2003 by Basu, Su, Basu, S., Makela, J. J., Sheehan, R. E., MacKenzie, E., Doherty, P., Wright, J. W., Keskinen, M. J., Pallamraju, D., Paxton, L. J., Berkey, F. T.

“…We consider VHF amplitude scintillations, GPS phase fluctuations, ionosonde measurements, maps of GPS total electron content (TEC), observations of daytime…”
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Magnetospheric effects from man-made ELF/VLF modulation of the auroral electrojet by Keskinen, M. J., Rowland, H. L.

“…A model for the magnetospheric effects of ELF/VLF modulation of the auroral electrojet using high‐power ground‐based high‐frequency radio waves is developed…”
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Characteristics of plasma structuring in the cusp/cleft region at Svalbard by Basu, S., Weber, E. J., Bullett, T. W., Keskinen, M. J., MacKenzie, E., Doherty, P., Sheehan, R., Kuenzler, H., Ning, P., Bongiolatti, J.

“…Satellite scintillation, all‐sky optical imager, and digisonde observations were coordinated during a cusp campaign conducted at Ny Alesund, Svalbard (78.9°N,…”
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Magnetic-flux-tube-integrated evolution of equatorial ionospheric plasma bubbles by Keskinen, M. J., Ossakow, S. L., Basu, Santimay, Sultan, P. J.

“…The nonlinear evolution of plasma bubbles in the equatorial ionosphere has been computed using an inhomogeneous magnetic‐flux‐tube‐integrated model. We find…”
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Fully kinetic Fokker-Planck model of thermal smoothing in nonuniform laser-target interactions by Keskinen, M J

“…Using a fully kinetic 2D Fokker-Planck model, the generation and evolution of ion density perturbations from nonuniform laser deposition in a plasma slab have…”
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Enhancement or suppression of irregularities in the high-latitude trough ionosphere using high-power radio waves by Keskinen, M. J.

“…The parametric coupling processes of a large‐amplitude electromagnetic pump wave with the temperature gradient drift instability in the high‐latitude trough…”
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Photonic band gaps in dusty plasma crystals by Keskinen, M. J., Fernsler, R.

“…A two-dimensional model for electromagnetic wave propagation in a dusty plasma crystal is solved using plane wave expansion techniques. We show that photonic…”
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Large magnetic storm-induced nighttime ionospheric flows at midlatitudes and their impacts on GPS-based navigation systems by Basu, Su, Basu, S., Makela, J. J., MacKenzie, E., Doherty, P., Wright, J. W., Rich, F., Keskinen, M. J., Sheehan, R. E., Coster, A. J.

“…Analysis of GPS phase fluctuations in conjunction with regional total electron content (TEC) maps, in situ measurements of subauroral polarization streams…”
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Generation of transient electric field structures in femtosecond high intensity ionizing laser pulses by Keskinen, M.J, Fernsler, R, Ladouceur, H.D, Baronavski, A.P, Grounds, P.W

“…A model for the generation of electric field structures in ultrashort high intensity laser pulses in air is developed. A collisionless plasma fluid model is…”
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