6 Nov 98 Delta Iridium Prelaunch Elset

Ron Lee (ronlee@pcisys.net)
Wed, 04 Nov 1998 20:07:32 -0700

Iridium, Delta, 13:37:52 UT, 6 Nov 98 (Normal Orbit)
1 99999U 980XXA   98310.60977108  .00006968  00000-0  95478-3 0    10
2 99999  86.5750 312.2912 0011325 222.9550 137.4309 14.78297487    09

Using this elset, expect the objects about one minute later than predicted.
It also assumes a NORMAL profile. If the profile is like the launch in
September, replace the mean motion (14.78297487) with 15.14
What the heck, here it is. I did not do a parity check after replacing
the mean motion.

Iridium, Delta, 13:37:52 UT, 6 Nov 98  (LOW ORBIT)
1 99999U 980XXA   98310.60977108  .00006968  00000-0  95478-3 0    10
2 99999  86.5750 312.2912 0011325 222.9550 137.4309 15.14096788000041

This last elset may have additional time and cross-track uncertainties
so allow additional time before and after the predicted time AND scan
perpendicular to the predicted path.

Launch occurs during darkness in California (lucky folks).  First likely
obs is in the Moscow area around 1453 UT. At that time I think about two
Iridiums will be deployed.

Alaska then Hawaii will have a chance to see it on the first rev.

Then around 1630 UT, the eastern Scandinavian Countries will have an
opportunity.  Passage over London occurs around 1807 UT then possibly
an opportunity in eastern Australia around 1848 UT.

AS always, if anyone sees it early, please try to quickly post an
approximate indication of any errors and the elset you used.  I would 
assume that on the first rev, either one MIGHT work.  At Moscow, the time
delta is perhaps a minute and 5 degrees in elevation difference. By the
time it gets to London two revs later, the time difference is about 
4 minutes and about 8 degrees of elevation difference.

If orbital data is posted soon, I will verify the elsets and post a 
suggested one to use.

Ron Lee