Hello All,
March 12, 2000 1338 UTC
This is my final on the subject of impossible TLEs (Its too cold to
be standing on the bridge). However I will advise of such TLEs found
of primary objects in the future as I drive across the bridge.
Only elset I (OIG/GSFC has none) have record of for this NORAD #.
Also best to just forget about it with the 1997 epoch and 1965 decay
date.
84041 A ( COSMOS 1522 ) 35824 x 35783 km
1 01494U 84041A 97019.58770024 -.00000095 00000-0 00000-0 0 5210
2 01494 9.2836 44.9561 0004884 276.9260 83.0344 1.00222127 14322
Note: 1st 1984 NORAD cataloged entry is 14611U COSMOS 1522 1984-001A
decayed
01494U SL-8 DEB 1965-020BU 09/04/1965 per OIG SSR
01494 SL-8 DEB Decayed: 1965/09/04 No TLE found. per OIG web
===================================================================
As stated, detection of 'impossible' TLEs is fully dependent on what
is your latest elset. I, and possibly others, do not have the ability
to view an elset and recognized that at least NORAD #, cospar, mean
motion and inclination are in sync to accept it. So I depend on
programs and those with better abilities to advise me. With this
in mind, permit me this swan song.
An example (2nd elset) how a published 'invalid' TLE _can_ cause
unattended (no error alerts) updating/extraction programs to make
interesting output files. The cospar is wrong, but yes in this
example the rest of the elset is correct. But what if it wasn't and
it was the latest elset your relying on tonight?
THAICOM 3
1 24768U 97016A 99255.74741475 -.00000143 00000-0 10000-3 0 3222
2 24768 0.0575 251.2644 0005764 243.1564 204.4487 1.00271161 9037
THAICOM 3
1 24768U 99047B 99300.89639529 -.00000131 +00000-0 +10000-3 0 03453
2 24768 000.0576 259.7878 0002585 300.3852 236.8707 01.00271633009492
THAICOM 3
1 24768U 97016A 00057.88977505 -.00000133 00000-0 10000-3 0 3885
2 24768 0.0574 267.9205 0004782 110.7753 176.1193 1.00271084 10711
Note: 1st 1999 NORAD cataloged entry is 25605U MLP 1999-001A
24768U THAICOM 3 1997-016A per OIG SSR
The point of the above? A thumbs up to all authors of TLE programs
with error detection alerts!
John Gardner,Jr
Hoarder of TLEs
gardjw@juno.com
76.98569 W 39.00195 N 62.484m ASL
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This archive was generated by hypermail 2b29 : Sun Mar 12 2000 - 06:31:00 PST