On Fri, Apr 09, 2010 at 01:14:07PM -0400, John Sessoms wrote:
> Ran accross this:
>
> http://www.youtube.com/watch?v=o4g930pm8Ms
>
> I think these are transponder codes recorded by geo-stationary
> satellites & someone has patched them all together & condensed 24 hours
> into about a minute of video.
Unlikely.
It's almost certainly done by working from the flight schedules, and
interpolating the plane position along a great circle route between
the departure and arrival cities.
I know because I did precisely that for Star Alliance as a screen-saver
over five years ago (which is quite possibly where the idea for this
came from; I even used the NASA "Blue Marble" map as the background,
and showed a day/night terminator, just as this example does). Mine
is also running in the Boeing customer demonstration area.
If you want to see it in HD resolution (1920x1080), with a few other
little tricks (Mercator projection for the background map, and the
shape of the terminator and the snow cover of the underlying maps
showing progress through a full year in the course of one cycle),
there's a large (83MB) animation available here:
http://essence.goldenware.com/~johnf/demo/fftest.asf
> Anyway, I thought it was cool just how busy and interconnected the
> planet seems to have become.
It looks even busier if you have the full flight schedule database.
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