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    Atmospheric Gravity Wave (AGW) Sources and Propagation Observations: Events on April 15, 1989 at Sondre Stromfjord

Atmospheric Gravity Wave (AGW) Sources and Propagation Observations: Events on April 15, 1989 at Sondre Stromfjord

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Two large energetic ionospheric events occurred at 1515 UT and 1610 UT on April 15, 1989 at Sondre Stromfjord. Using measurements from the incoherent scatter radar and a simultaneously-operating magnetometer, we obtained data describing Joule heating, electric fields, current densities, ion velocities, and Pedersen and Hall conductivities in the ionospheric-E-region.