On the location and structure of the artificial 630-nm airglow patch over Sura facility (2008)
Grach, S. M., Kosch, M. J., Yashnov, V. A., Sergeev, E. N., Atroshenko, M. A., Kotov, P. V.
Results are presented of the artificial optical emission of the atomic oxygen red line (the radiation of level O(1D) with a wavelength of 630 nm) from the HF-pumped ionosphere, obtained in September...
Senior, A., Kosch, M. J., Yeoman, T. K., Rietveld, M. T., Mccrea, I. W.
Observations of HF radar backscatter from artificial field-aligned irregularities in an ionosphere perturbed by travelling disturbances due to atmospheric gravity waves are presented. Some features...
The electron energy distribution during HF pumping, a picture painted with all colors (2008)
Gustavsson, B., Sergienko, T., Kosch, M. J., Rietveld, M. T., Brändström, B. U. E., Leyser, T. B., ...
The shape of the electron energy distribution has long been a central question in the field of high-frequency radio-induced optical emission experiments. This report presents estimates of the...
Relative drift between black aurora and the ionospheric plasma (2008)
Blixt, E. M., Kosch, M. J., Semeter, J.
Black auroras are recognized as spatially well-defined regions within uniform diffuse aurora where the optical emission is significantly reduced. Although a well studied phenomenon, there is no...
Kosch, M. J., Pedersen, T., Hughes, J., Marshall, R., Gerken, E., Senior, A., ...
High-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial...
Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities (2008)
Senior, A., Borisov, N. D., Kosch, M. J., Yeoman, T. K., Honary, F., Rietveld, M. T.
We 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...
Dynamics of Alfvén waves in the night-side ionospheric Alfvén resonator at mid-latitudes (2008)
Alpatov, V. V., Deminov, M. G., Faermark, D. S., Grebnev, I. A., Kosch, M. J.
A numerical solution of the problem on dynamics of shear-mode Alfvén waves in the ionospheric Alfvén resonator (IAR) region at middle latitudes at nighttime is presented for a case when a source...
Aruliah, A. L., Griffin, E. M., Aylward, A. D., Ford, E. A. K., Kosch, M. J., Davis, C. J., ...
This paper presents the first direct empirical evidence that mesoscale variations in ion velocities must be taken into consideration when calculating Joule heating and relating it to changes in ion...
Ashrafi, M., Kosch, M. J., Honary, F.
Energy maps are important for ionosphere-magnetosphere coupling studies, because quantitative determination of field-aligned currents requires knowledge of the conductances and their spatial...
Blagoveshchenskaya, N. F., Borisova, T. D., Kornienko, V. A., Thidé, B., Rietveld, M. T., Kosch, M. J., ...
Experimental results from three ionospheric HF pumping experiments in overdense E or F regions are summarized. The experiments were conducted by the use of the EISCAT HF Heating facility located near...
The statistical dependence of auroral absorption on geomagnetic and solar wind parameters (2008)
Kavanagh, A. J., Kosch, M. J., Honary, F., Senior, A., Marple, S. R., Woodfield, E. E., ...
Data from the Imaging Riometer for Ionospheric Studies (IRIS) at Kilpisjärvi, Finland, have been compiled to form statistics of auroral absorption based on seven years of observations. In a previous...
Borisova, T. D., Blagoveshchenska, N. F., Moskvin, I. V., Rietveld, M. T., Kosch, M. J., Thidé, B.
Comparisons between bistatic scatter measurements and simulation results during the Tromsø HF pumping experiment on 16 February 1996 are made. Doppler measurements of an HF diagnostic signal...
Study of auroral forms and electron precipitation with the IRIS, DASI and EISCAT systems (2008)
Del Pozo, C. F., Honary, F., Stamatiou, N., Kosch, M. J.
Simultaneous observations with the IRIS, DASI and EISCAT systems are employed in the study of the spatial distribution and temporal evolution of auroral forms and precipitation regions during...
Estimation of the characteristic energy of electron precipitation (2008)
Del Pozo, C. F., Kosch, M. J., Honary, F.
Data from simultaneous observations (on 13 February 1996, 9 November 1998, and 12 February 1999) with the IRIS, DASI and EISCAT systems are employed in the study of the energy distribution of the...
Sugino, M., Fujii, R., Nozawa, S., Nagatsuma, T., Buchert, S. C., Gjerloev, J. W., ...
Attempting to derive the field-aligned current (FAC) density using the EISCAT radar and to understand the role of the ionosphere on closing FACs, we conducted special radar experiments with the...
Cierpka, K., Kosch, M. J., Rietveld, M., Schlegel, K., Hagfors, T.
Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the...
Kosch, M. J., Hagfors, T., Schlegel, K.
Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in...
On the location and structure of the artificial 630-nm airglow patch over Sura facility (2008)
Grach, S. M., Kosch, M. J., Yashnov, V. A., Sergeev, E. N., Atroshenko, M. A., Kotov, P. V.
Results are presented of the artificial optical emission of the atomic oxygen red line (the radiation of level O(1D) with a wavelength of 630 nm) from the HF-pumped ionosphere, obtained in September...
Senior, A., Kosch, M. J., Yeoman, T. K., Rietveld, M. T., Mccrea, I. W.
Observations of HF radar backscatter from artificial field-aligned irregularities in an ionosphere perturbed by travelling disturbances due to atmospheric gravity waves are presented. Some features...
The electron energy distribution during HF pumping, a picture painted with all colors (2008)
Gustavsson, B., Sergienko, T., Kosch, M. J., Rietveld, M. T., Brändström, B. U. E., Leyser, T. B., ...
The shape of the electron energy distribution has long been a central question in the field of high-frequency radio-induced optical emission experiments. This report presents estimates of the...
Relative drift between black aurora and the ionospheric plasma (2008)
Blixt, E. M., Kosch, M. J., Semeter, J.
Black auroras are recognized as spatially well-defined regions within uniform diffuse aurora where the optical emission is significantly reduced. Although a well studied phenomenon, there is no...
Kosch, M. J., Pedersen, T., Hughes, J., Marshall, R., Gerken, E., Senior, A., ...
High-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial...
Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities (2008)
Senior, A., Borisov, N. D., Kosch, M. J., Yeoman, T. K., Honary, F., Rietveld, M. T.
We 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...
Dynamics of Alfvén waves in the night-side ionospheric Alfvén resonator at mid-latitudes (2008)
Alpatov, V. V., Deminov, M. G., Faermark, D. S., Grebnev, I. A., Kosch, M. J.
A numerical solution of the problem on dynamics of shear-mode Alfvén waves in the ionospheric Alfvén resonator (IAR) region at middle latitudes at nighttime is presented for a case when a source...
Aruliah, A. L., Griffin, E. M., Aylward, A. D., Ford, E. A. K., Kosch, M. J., Davis, C. J., ...
This paper presents the first direct empirical evidence that mesoscale variations in ion velocities must be taken into consideration when calculating Joule heating and relating it to changes in ion...
Ashrafi, M., Kosch, M. J., Honary, F.
Energy maps are important for ionosphere-magnetosphere coupling studies, because quantitative determination of field-aligned currents requires knowledge of the conductances and their spatial...
Blagoveshchenskaya, N. F., Borisova, T. D., Kornienko, V. A., Thidé, B., Rietveld, M. T., Kosch, M. J., ...
Experimental results from three ionospheric HF pumping experiments in overdense E or F regions are summarized. The experiments were conducted by the use of the EISCAT HF Heating facility located near...
The statistical dependence of auroral absorption on geomagnetic and solar wind parameters (2008)
Kavanagh, A. J., Kosch, M. J., Honary, F., Senior, A., Marple, S. R., Woodfield, E. E., ...
Data from the Imaging Riometer for Ionospheric Studies (IRIS) at Kilpisjärvi, Finland, have been compiled to form statistics of auroral absorption based on seven years of observations. In a previous...
Borisova, T. D., Blagoveshchenska, N. F., Moskvin, I. V., Rietveld, M. T., Kosch, M. J., Thidé, B.
Comparisons between bistatic scatter measurements and simulation results during the Tromsø HF pumping experiment on 16 February 1996 are made. Doppler measurements of an HF diagnostic signal...
Study of auroral forms and electron precipitation with the IRIS, DASI and EISCAT systems (2008)
Del Pozo, C. F., Honary, F., Stamatiou, N., Kosch, M. J.
Simultaneous observations with the IRIS, DASI and EISCAT systems are employed in the study of the spatial distribution and temporal evolution of auroral forms and precipitation regions during...
Estimation of the characteristic energy of electron precipitation (2008)
Del Pozo, C. F., Kosch, M. J., Honary, F.
Data from simultaneous observations (on 13 February 1996, 9 November 1998, and 12 February 1999) with the IRIS, DASI and EISCAT systems are employed in the study of the energy distribution of the...
Sugino, M., Fujii, R., Nozawa, S., Nagatsuma, T., Buchert, S. C., Gjerloev, J. W., ...
Attempting to derive the field-aligned current (FAC) density using the EISCAT radar and to understand the role of the ionosphere on closing FACs, we conducted special radar experiments with the...
Cierpka, K., Kosch, M. J., Rietveld, M., Schlegel, K., Hagfors, T.
Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the...
Kosch, M. J., Hagfors, T., Schlegel, K.
Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in...
High-frequency magnetospheric sounding at EISCAT: Some trials and their implications (2008)
Senior, A., Honary, F., Chapman, P.J., Rietveld, M.T., Kelso, T.S., Kosch, M.J.
Combined EISCAT radar and optical multispectral and tomographic observations of black aurora (2008)
Gustavsson, B., Kosch, M.J., Senior, A., Kavanagh, A.J., Brändström, B.U.E., Blixt, E.M.
Black auroras are recognized as spatially well-defined regions within a uniform diffuse auroral background where the optical emission is significantly reduced. Black auroras typically appear...
Senior, A., Kavanagh, A. J., Kosch, M. J., Honary, F.
Statistical models expressing the Hall and Pedersen conductances and their ratio as functions of cosmic noise absorption (CNA) are derived for five intervals of magnetic local time (MLT). The models...
Kosch, M. J., Pedersen, T., Mishin, E., Starks, M., Gerken-Kendall, E., Sentman, D., ...
On 4 February 2005 the High-Frequency Active Auroral Research Program (HAARP) facility was operated at 2.85 MHz to produce artificial optical emissions in the ionosphere while passing through the...
Kosch, M. J., Pedersen, T., Mishin, E., Oyama, S., Hughes, J., Senior, A., ...
On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in...
Ashrafi, M., Kosch, M. J., Kaila, K., Isham, B.
On 12 November 2001, the European Incoherent Scatter (EISCAT) high-frequency (HF) radio wave transmitter facility, operating in O-mode at 5.423 MHz with 550 MW effective radiated power, produced...
On the Location and Structure of the Artificial 630-nm Airglow Patch over Sura Facility. (2007)
Grach, S. M., Kosch, M. J., Yashnov, V. A., Sergeev, E. N., Atroshenko, M. A., Kotov, P. V.
Senior, A., Kavanagh, A. J., Kosch, M. J., Honary, F.
Statistical models expressing the Hall and Pedersen conductances and their ratio as functions of cosmic noise absorption (CNA) are derived for five intervals of magnetic local time. The models are...
Oyama, S., Watkins, B. J., Djuth, F. T., Kosch, M. J., Bernhardt, P. A., Heinselman, C. J.
Plasma lines excited by a powerful, high-frequency (HF) radio wave are studied using data obtained with an ultrahigh frequency (UHF) radar at HAARP (High Frequency Active Auroral Research Program)...
EISCAT Radar and Optical Studies of Black Aurora: A Signature of Magnetospheric Turbulence? (2006)
Kosch, M. J., Gustavsson, B., Blixt, E. M., Pedersen, T., Senior, A., Kavanagh, A. J., ...
Black auroras are recognised as spatially well-defined regions within a uniform diffuse auroral background where the optical emission is significantly reduced, or possibly totally absent. Black...
Observations of the overshoot effect during the 2004 EISCAT PMSE campaign (2006)
Havnes, O., La Hoz, C., Aylward, A., Belova, E., Hartquist, T. W., Kosch, M. J., ...
Observations of the Overshoot Effect during the 2004 EISCAT PMSE Campaign (2006)
Havnes, O., Hoz, C. La, Aylward, A., Belova, E., Hartquist, T. W., Kosch, M. J., ...
Mishin, E. V., Kosch, M. J., Pedersen, T. R., Burke, W. J.
We analyze airglow induced by intense radio waves at the High-frequency Active Auroral Research Program (HAARP) facility for pump frequencies f 0 near the second and third electron gyroharmonic (f c...
Height Triangulation of Artificial Optical Emissions in the F-layer (2005)
Ashrafi, M., Kosch, M. J., Kaila, K.
Using the EISCAT high gain high frequency (HF) Heating facility located in northern Scandinavia (69.59deg N, 19.23deg E), HF-induced artificial auroral emissions can be produced at ionospheric...
The 31st Annual European Meeting on Atmospheric Studies by Optical Methods was held in Ambleside in the Lake District in north-west England on 23-26 August 2004. The meeting had 41 attendees and 51...
The Electron Energy Distribution during HF Pumping, a Picture Painted with All Colors. (2005)
Gustavsson, B., Sergienko, T., Kosch, M. J., Rietveld, M. T., Brändström, B. U. E., Leyser, T. B., ...
Ionospheric modification at twice the electron cyclotron frequency (2005)
Djuth, F.T., Pedersen, T.R., Gerken, E.A., Bernhardt, P.A., Selcher, C.A., Bristow, W.A., ...
Dynamics of Alfvén Waves in the Night-side Ionospheric Alfvén Resonator at Mid-latitudes. (2005)
Alpatov, V. V., Deminov, M. G., Faermark, D. S., Grebnev, I. A., Kosch, M. J.
Blagoveshchenskaya, N. F., Borisova, T. D., Kornienko, V. A., Thidé, B., Rietveld, M. T., Kosch, M. J., ...
Aruliah, A.L., Griffin, E.M., Aylward, A.D., Ford, E.A.K., Kosch, M.J., Davis, C.J., ...
This paper presents the first direct empirical evidence that mesoscale variations in ion velocities must be taken into consideration when calculating Joule heating and relating it to changes in ion...
Multi-frequency HF Radar Measurements of Artificial F-region Field-aligned Irregularities. (2004)
Senior, A., Borisov, N. D., Kosch, M. J., Yeoman, T. K., Honary, F., Rietveld, M. T.
Novel Artificial Optical Annular Structures in the High Latitude Ionosphere over EISCAT (2004)
Kosch, M. J., Rietveld, M. T., Senior, A., McCrea, I. W., Kavanagh, A. J., Isham, B., ...
The EISCAT low-gain HF facility has been used repeatedly to produce artificially stimulated optical emissions in the F-layer ionosphere over northern Scandinavia. On 12 November 2001, the high-gain...
Rietveld, M. T., Kosch, M. J., Blagoveshchenskaya, N. F., Kornienko, V. A., Leyser, T. B., Yeoman, T. K.
Coordinated Optical and EISCAT Observations of Black Aurora. (2004)
An image intensified video camera was used in conjunction with