Re: Spot 3 Rk + Resurs O1-3 Pass - East Coast USA
Björn Gimle (b_gimle@algonet.se)
Thu, 11 Mar 1999 23:20:13 +0100
>This evening (11 March) from 19:22 to 19:25 EST (00:22 to 00:25 UTC) there
>will be an interesting pass for most of the East Coast, USA. During this time
>frame Resurs O1-3 will appear to overtake and pass the Spot 3 Rk. The pass
...
I used the latest OIG elsets and Track16 to compute absolute positions.
The lat/lon/height linear extrapolations to ground level of the lines
joining the two objects were only a few degrees from the ground tracks.
If they had been further, and/or I had more time, I would have made the
computations in XYZ space.
As it appears with this approximation, the Ariane 40 r will be "occulted"
by the lower Resurs 01-3 at 72.3W/25.1N when Resurs leaves Earth shadow
at 00:20:20 UT.
At 00:21:00 the line hits ground at 72.9W/27.9N
00:22:00 73.6W/32.1N
00:23:00 74.5W/36.2N
00:24:00 75.5W/40.4N
00:25:00 76.6W/44.5N Overtaking near culmination.
00:26:00 77.6W/48.7N
00:27:00 79.0W/52.8N
00:28:00 80.5W/56.9N
00:29:00 82.4W/61.1N
RESURS O1 B Mar.11
1 23342U 94074A 99070.19202377 +.00000630 +00000-0 +11172-3 0 01484
2 23342 097.8306 111.5300 0001857 076.3174 283.8240 14.70443853233283
ARIANE 40 R/B Mar.11
1 22830U 93061H 99070.16758932 +.00000170 +00000-0 +84562-4 0 07489
2 22830 098.3330 113.2253 0012110 130.3743 229.8497 14.28262884284332
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