@Hyperveloce, AndRand and OleOle
As probably many others, I tried to make some maths, just to see if I have understood anything about those Inmarsat conclusions. It is relativly simple maths because we have the sat data trajectory using Internet data (
LIVE REAL TIME SATELLITE TRACKING AND PREDICTIONS: INMARSAT 3-F1) and softwares to extract 3D position of the sat. Also, finding 3D a/c positions along suppose path is easy. And thus, finding approximated distance between them for example every minute is not complicated. So, a very good approximation of the relative speed by "derivating" for each minute.
And what I found is, as you say, very far from what is in THE chart, about a 5 times factor. And also neg values, that are very logical when the a/c was flying west. So, what?
Perhaps the Inmarsat data show only a delta (absolute value)?
Threemiles post last night these data:
http://www.pprune.org/rumours-news/5...ml#post8409275 probably from this page:
Acceptability of transmitters for licensing.
If the "335Hz" max value was applied, could we have to substract a constant, say 200Hz?