Space physics, Experiments, Inverse problems - Daily Reports (seiðr). Writings about various topics in plasma physics, radio science, space physics, rockets, radars, aurora, remote sensing, geophysics, radio astronomy, inverse problems, outdoors activities, electronics, and software defined radio. The web page of the radio science group at University of Tromsø.
Sometimes the aurora is "a bit more dynamic than usual" as during the afternoon on December 3rd 2005, when we could observe flickering aurora on and off for a long period, in the video above we show 70 s of flickering aurora observed with the Odin imager, that was pointing towards magnetic zenith with a field-of-view of 10-by-16 degrees. The swirling and rotating structures you can see have intensity-variations of approximately 10 per cent and at frequencies between 5 and 12 Hz. Investigating such dynamic aurora is one of the main objectives with the EISCAT 3D project - but making IS-radar measurements with time-resolution good enough to follow these variations will still be challenging. Our best chance to get forward will be to combine observations with the EISCAT 3D radar and optical instrumentation.