Re: TRMM a bit late

Alan Pickup (alan@wingar.demon.co.uk)
Wed, 23 Dec 1998 07:43:58 +0000

With respect to TRMM being late against predictions, Mark Hanning-Lee
<mhanning-lee@syagen.com> writes
>...
>
>These are pretty good, but a bit late; has the orbit been trimmed
>recently? Or would you say that's in the normal range of aging of TLEs?
>In general, how late can a sat be before it's newsworthy ;-)?

TRMM is indeed manoeuvring, as can be seen in these recent elsets:

TRMM             4.0  0.0  0.0  5.6 d            347 x 346 km
1 25063U 97074A   98354.20484172  .00057791  00000-0  38379-3 0  5291
2 25063  34.9960 298.7923 0000882 271.3643  88.6985 15.74287439 61060
TRMM             4.0  0.0  0.0  5.6 d            348 x 347 km
1 25063U 97074A   98354.96576038  .00055962  00000-0  37781-3 0  5303
2 25063  34.9975 293.6238 0000948 230.1774 129.5314 15.73913560 61184
TRMM             4.0  0.0  0.0  5.6 d            350 x 346 km
1 25063U 97074A   98355.21952505 -.00259260  00000-0 -18180-2 0  5310
2 25063  34.9980 291.9105 0002888 192.5096 167.5567 15.73857733 61223
TRMM             4.0  0.0  0.0  5.6 d            350 x 346 km
1 25063U 97074A   98355.21953223 -.00261074  00000-0 -18315-2 0  5392
2 25063  34.9969 291.9053 0002592 196.5215 163.5839 15.73854734 61227
TRMM             4.0  0.0  0.0  5.6 d            348 x 347 km
1 25063U 97074A   98355.91732480  .00013978  00000-0  94764-4 0  5322
2 25063  34.9956 287.1616 0000676 247.5359 113.3734 15.74019141 61337
TRMM             4.0  0.0  0.0  5.6 d            348 x 347 km
1 25063U 97074A   98356.17085782  .00067594  00000-0  45227-3 0  5330
2 25063  34.9942 285.4361 0001080 270.4364  89.6243 15.74083050 61375
TRMM             4.0  0.0  0.0  5.6 d            348 x 347 km
1 25063U 97074A   98356.86846004  .00059068  00000-0  39438-3 0  5343
2 25063  34.9944 280.6970 0000905 269.8239  90.2369 15.74159997 61481

It is one of the objects I include in select.tle, available via my
SatEvo WWW page.

Alan
-- 
 Alan Pickup | COSPAR 2707:   55d53m48.7s N   3d11m51.2s W   156m asl
 Edinburgh   | Home:   alan@wingar.demon.co.uk    +44 (0)131 477 9144
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