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SuperDARN is a network of HF radars (8-20 MHz) used to study the convection in the Earth's ionosphere at altitudes between 90 and 400 km and at magnetic latitudes between 60° and 90° (each radar has 16 azimuthal beams and 75 ranges).
SuperDARN developed in the last 12 years.
and 7 in the southern hemisphere.
At present, 10 radars operate in the northern hemisphere
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Temporal Response of Ionospheric Convection to Solar Wind Transitions
SuperDARN Science highlights.
Imaging High-Latitude Ionospheric Convection
Determination of Global Poynting Flux and Joule Heating
Global Detection of Atmospheric Gravity Waves and Planetary Waves
Measurement of Cross-Polar-Cap Potential Drop
Magnetic Reconnection Science
Flow Transients and Variability
Conjugate Studies of Ionospheric and Magnetospheric Convection
Ionospheric Plasma Instabilities
ULF Pulsations
Magnetic Conjugacy
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Bz < 0
Bz > 0
Magnetic reconnection in the magnetosphere.
12 MLT
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Imaging High-Latitude Ionospheric Convection
SphericalharmonicsJHUAPLmodelfor CPCpotential
12 MLT
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• Counter-rotating convection cells in the dayside high-latitude polar cap [From Huang et al., 2000].
• These patterns had been postulated to occur under northward IMF conditions.
• SuperDARN was the first instrument network to confirm their existence.
Imaging High-Latitude Ionospheric Convection
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Near midnight MLT. EquinoxEquatorward moving bands of scatterLow spectral width well defined speeds.Coincident in UT and magnetic latitude.
Several cases found.Origin unknown.
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SuperDARN potential maps
Istituto di Fisica dello Spazio Interplanetario, INAF, Roma.
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Istituto di Fisica dello Spazio Interplanetario, INAF, Roma.
SuperDARN potential maps
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Istituto di Fisica dello Spazio Interplanetario, INAF, Roma.
SuperDARN potential maps
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SuperDARN potential mapshttp://superdarn.jhuapl.edu/