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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.

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Presentation on theme: "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."— Presentation transcript:

1 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

2 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

3 B z < 0 B z > 0 Magnetic reconnection in the magnetosphere. 12 MLT

4 Imaging High-Latitude Ionospheric Convection Spherical harmonics JHUAPL model for CPC potential 12 MLT

5 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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9 Near midnight MLT. Equinox Equatorward moving bands of scatter Low spectral width well defined speeds. Coincident in UT and magnetic latitude. Several cases found. Origin unknown.

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11 SuperDARN potential maps Istituto di Fisica dello Spazio Interplanetario, INAF, Roma.

12 SuperDARN potential maps

13 Istituto di Fisica dello Spazio Interplanetario, INAF, Roma. SuperDARN potential maps

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