Summary
All-sky imaging Fabry-Perot spectrometers can provide two dimensional maps of thermospheric wind and temperature fields over a circular region spanning around 1400 km in diameter at F-region heights, or about half this in the E-region. Typical configurations used to date have resolved a few tens of look directions across their field of view. Here we report on an 8-day campaign conducted in March of 2011 in which an instrument at Mawson, Antarctica, was configured to resolve its wind and temperature measurements into 261 independent look directions. This is far higher spatial resolution than has ever been attempted previously. It was made possible by the combination of a new and more sensitive detector coupled with observations taken during a period of higher solar and magnetic activity than has been typical in recent years. Several nights of excellent data were obtained and will be discussed here. While the wind fields did not display much additional high-resolution structure, the 5577A Doppler temperature fields did display a lot of structure associated with individual auroral arcs. While this mode is probably not optimum during periods of weak signal, it does offer the potential to explore very small spatial scales during active times.