python said:good observations there, blutto, on the reflective logic...
but this post is about something different that intrigued me earlier
i performed some quick research using absolutely open sources on how missiles, including the surface-to-air ones, are guided and maneuvered...
it turns out, a buk missile that a russian general assures typically attacks its air targets from above, is more than capable both in theory (which is a basic Newtonian physics) and practice (for which hundreds of patents are available on-line) to perform a quick up-down terminal homing maneuver even at velocities close to m3
...specifically, most sources place the buk missile maneuverability at about 24g. for a comparison, the most agile fighters top at around 7 or 8g, otherwise, either its pilot blacks out or the plane's structure disintegrates. it is not difficult to calculate that at a given residual treminal weight (about 200 kg), air velocity (about 2.7g) elevation (about 10k and air drag (an unknown but easily estimated) the buk missile can turn 180 degr at a vertical radius shorter than 1km.
this agility, as i properly speculated, is achievable by the missiles motor thrust vectoring...here's an example of a patent for one of the variants:
http://www.google.com/patents/US4131246
the russkie general was likely having an agenda, but unlike some high flyers, he sticks to what he knows and what can be checked out, at least with my amateurish approach.
...good one...real good one....
Cheers