This is the M-55 Geophysica, a Russian high altitude research aircraft. It reaches altitudes up to 21 km and has a flight duration of up to 5 hours. It was built as a Russian spy plane in the 1970s and was reconstructed to an atmospheric research aircraft in the 1990s.
It arrived yesterday shortly after us and is now sitting in the huge Arena Arctica here in Kiruna.
The plan is to have two test flights during the next two weeks. The first one Thursday 21st of April and the second on Monday 25th. Until then we still need to test the integration onto the aircraft, do lab tests with the instruments and some other preparations.