What operation is this aircraft performing? While reading Wikipedia about Ust-Kut Airport, I've run into the following picture:

I'd like to know which operation is depicted here?
This doesn't seems to be a take-off, as per my very limited knowledge. It is by far landing. If I am correct then how it is possible that a landing plane, at this altitude, still doesn't have its gear down?
The flight in question is most probably an evaluation/calibration flight for radio navigation systems at Ust-Kut. The aircraft is a Yak-40 special version designated for such tasks:
Aviamuseum - Yak-40 &quot;Calibrator&quot;