July 21st, 2011, 02:00 AM
is there something strange in this video? I mean, is it usual two planes passing closely in this way?
July 21st, 2011, 03:58 AM
This is a fairly complete general explanation of separation:
However, its possible these flights are at RVSM altiude, where other rules apply:
Its also possible that there was a violation.
A photogrammatic analysis could possibly tell you more, if done carefully:
One hint that the planes are not so close is lack of wake vortex effects on the contrails, but since they weren't persistent, it is hard to tell.
July 21st, 2011, 04:07 AM
July 21st, 2011, 06:20 AM
It's pretty much impossible to tell a difference of a few thousand feet from the ground, and certainly not from a low resolution video.
So long as there's 1000 feet vertically between them, then it's fine, and in fact happens relatively frequently.
This si what it looks like from the cockpit:
And here's one with THREE planes crossing the path of another. All perfectly legal and safe:
July 21st, 2011, 11:52 AM