The role of electric field and neutral wind direction in the formation of sporadic E-layers

T. Nygrén, L. Jalonen, J. Oksman, +1

Journal of Atmospheric and Terrestrial Physics

GeophysicsElectrical EngineeringEngineeringSporadic E-layersAtmospheric Science +6

Ion composition in sporadic <i>E</i> layers measured by the EISCAT UHF radar

A. Huuskonen, T. Nygrén, L. Jalonen, +4

Journal of Geophysical Research Atmospheres

RadarGeophysicsEngineeringAtmospheric ScienceRadar Scattering +9

On the morphology of energetic (≥30keV) electron precipitation during the growth phase of magnetospheric substorms

T. Pytte, H. Trefall, G. Kremser, +2

Journal of Atmospheric and Terrestrial Physics

GeophysicsEngineeringPhysicsAtmospheric ScienceMagnetohydrodynamics +8

Interference of tidal and gravity waves in the ionosphere and an associated sporadic E-layer

T. Nygrén, B. S. Lanchester, A. Huuskonen, +4

Journal of Atmospheric and Terrestrial Physics

GeophysicsAssociated Sporadic E-layerEngineeringAtmospheric ScienceSpace Physic +4

High resolution EISCAT observations of the ion-neutral collision frequency in the lower E-region

A. Huuskonen, T. Nygrén, L. Jalonen, +2

Journal of Atmospheric and Terrestrial Physics

Ion-neutral Collision FrequencyEngineeringPhysicsAtomic PhysicsLower E-region +4

Incoherent scatter studies of sporadic-E using 300 m resolution

T. Turunen, T. Nygrén, A. Huuskonen, +1

Journal of Atmospheric and Terrestrial Physics

High ResolutionSpectroscopyInterferometryM ResolutionWave Interference

Observation of a thin Es-layer by the eiscat radar

T. Turunen, J. Silén, T. Nygrén, +1

Planetary and Space Science

RadarEiscat RadarEngineeringAerospace EngineeringSynthetic Aperture Radar +3

A new method of measuring the ion-neutral collision frequency using incoherent scatter radar

T. Nygrén, L. Jalonen, A. Huuskonen

Planetary and Space Science

RadarIon-neutral Collision FrequencyIncoherent Scatter RadarEngineeringMeasurement +7

The large-scale ionospheric electric field: Its variation with magnetic activity and relation to terrestrial kilometric radiation

R. H. Holzworth, J. J. Berthelier, D. K. Cullers, +9

Journal of Geophysical Research Atmospheres

GeophysicsEngineeringAtmospheric ScienceSteady DawnGeomagnetism +10

Density profiles of sporadic E-layers containing two metal ion species

T. Nygrén, L. Jalonen, A. Huuskonen, +1

Journal of Atmospheric and Terrestrial Physics

EngineeringPhysicsElectron SpectroscopyApplied PhysicsAtomic Physics +4