posted on Dec, 9 2009 @ 07:05 AM
Originally posted by xalaran
where is earth in relation to the video is it directly below or it it facing away from earth riding on the dark side facing out to space?
X, that's exactly the right question to ask from the start. It can be hard to answer -- deliberately so, since date/time information is rarely
provided in such youtube postings, to prevent verification and context determination.
For the very end of a rendezvous such as this one, the chaser -- the shuttle -- is ahead of the target at the same altitude. The Russian view (with
the light) has space above and earth below, and shows the dark earth horizon, depressed from purely vertical by about 18 degrees -- that depends on
altitude, it's easy to compute from geometrical principles.
Converting the camera line of sight into a topographic azimuth, in order to match against the known sky, is tricky since the orbit flies in an
eastwards, shifting to southeastwards, then back to eastwards and then northeastwards direction over the course of each 92-minute orbit. So the
precise timing of the video is needed.
[edit on 9-12-2009 by JimOberg]