A while ago we reported, that the remote EISCAT UHF receivers in Kiruna and Sodankylä will be converted to the VHF frequency of 224 MHz in order to continue tristatic operations despite the interferences from mobile communication networks around the old frequency of 930 MHz.
With the new feed installed at Sodankylä, the conversion of the remote sites is complete – pending testing of the new setup using the Tromsø VHF transmitter. This is planned for next week.
SGO) after having been unbolted. Two cranes were needed: one for lifting the mirror, and the other holding a basket as a platform for doing the work.
These two photos are part of a series of thousands of images taken by a time-lapse camera on the roof of the EISCAT station. A time-lapse movie (Full HD 1080p) of the operation has been made available on-line. The movie is 7'34" long, based on images every 2 seconds and running at 25 fps. However, it failed to capture the action in the centre of the radar dish since it was pointed just a little too low. This unfortunate mistake is down to this specific camera not having a view finder allowing for exact aim. Well, we learnt something again: download test images before running all day.
See also the photos of the Sodankylä conversion, which were published on the KAIRA blog earlier this week.
Time-lapse images were a collaboration between Thomas Ulich, Toivo Iinatti, and Derek McKay-Bukowski. Photo of the feed on trailer by Thomas Ulich.