What orbital elements are others using for ISS? I downloaded
ISS (ZARYA) 1 25544U 98067A 03347.16153959 .00012592 00000-0 12817-3 0 8862 2 25544 51.6285 197.0395 0006049 240.9758 218.2116 15.65542665288988
from NORAD http://celestrak.com/NORAD/elements/stations.txt Is there a better source of elements I should be using? Using xephem I'm not quite getting agreement on the timing of the transit with other predictions I've seen on this thread. Alternatively, how about Delta T (i.e. TT - UT1)? Xephem uses a value of 67.45. It would be interesting to compare the predictions of the various charting packages and the observed timing. Jim On Dec 12, 2003, at 5:58 PM, James Helsby wrote:
I have a better one...
By my calculations (hehe, sound so scientific)
At 14:54:12 local time on 2003/12/21 at a location of (111 48 01 W) (40 42 00 N) [or the parking lot of the REI 3285 E 3300 S] it will cross.
Azimuth of 215.4998, altitude +17.1277.
http://www.xmission.com/~cyanics/images/chart.jpg
The link is a screen grab from the charting software. Please feel free to correct me if I am wrong ;-) The line represents ISS.
Cheers,
James
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