First observations of ionospheric irregularities and flows over the south geomagnetic pole from the SuperDARN HF radar at McMurdo Station, Antarctica

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[2439] Ionosphere / Ionospheric Irregularities, [2712] Magnetospheric Physics / Electric Fields, [2760] Magnetospheric Physics / Plasma Convection, [2776] Magnetospheric Physics / Polar Cap Phenomena

Scientific paper

In February 2010 a new SuperDARN radar began operation at McMurdo Station, Antarctica. The radar’s orientation places the south geomagnetic pole near the center of the field of view at about 1200 km range. The radar is the highest latitude radar of the SuperDARN network, both geographically and geomagnetically, and the observations have a different character than those of the auroral zone radars. One particular feature of note is the high incidence of observed backscatter. When ionospheric altitudes are above the solar shadow height the incidence of observation is greater than 80% for a large portion of the radar field of view. This is indicative of the near constant presence of field-aligned density irregularities in the polar cap. This paper presents statistics of the observations along with estimates of the convection velocity maps. Prevailing IMF and solar wind velocity were taken from the Omni database and compared to the observed flows.

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