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Something fun moving across TASS
Something fun to try,
You could determine a rough distance by measuring the separation between
outer streaks (Boeing 737-300 is 94' 9" or 737-900 is 112' 7" wing tip
to wing tip). Then there's the strobe on the bottom, flashing at a 1/sec
rate (most do) so you could almost calculate speed (737-300 approx.
speed is 495 mph & 737-900 approx. speed is 530 mph) w/ no head wind.
Finally with the angle of the streaks in a TASS image you could get a
rough direction. OK, it's not exact but it's still fun to try.
From: Beser, Nicholas D.(Nick)
Sent: Monday, January 05, 1998 5:05 PM
To: Tom Droege
Cc: email@example.com; Stupendous Man
Subject: Re: new additions to TASS home page
Tom Droege wrote:
> Very nice!! There is even more data than you indicated.
> 0-1 RA and -.2 to +.7 in Decl. gives a nice diagonal track.
> > I urge people to try this out: make a V-band chart of
> >(0.0 < RA < 0.5) and (0.0 < Dec < 0.5),
> >and look at chart: there's clearly an object which moves
> >field! It turns out to take only a few minutes to move all
> >way across a 3-degree swath, so I suspect that it's a
> >of some kind.
> Huh! Does this mean that Mike's program looked at the track
> many points??? Is this just one data field, or the
combination of a lot of
> measurements from different locations?? How can you tell
that it only
> took a few minutes to move all the way across the 3 degree
> Seeems like all the measurements have one time stamp??? I
> OK, I looked (by hand) at a couple of points on the track and
> came from G1A_0745. To hard to track them all down when a
> can do it.
> Hmmm! If a track is turned into many points is this good or
I think if you are seeing a track it is likely an aircraft. (We
see several in
I examined the original file (31t0745.621), and it shows three
typical of a aircraft.
We talked about this when we discussed the data screening. (I
plotted out the
output from star which included many stars generated from an
aircraft trail). I
don't recall if we decided if it was good or bad.