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README_TLE
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1995-03-13
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54 lines
ATTENTION:
For space shuttle flights element sets are updated rather frequently.
It is advisable to keep only the latest two-line element set in the
respective file, like 'sts-68.dat' for STS-68, that would contain only
the following three lines:
STS-68
1 23285U 94062A 94280.68166896 .00019593 12460-4 96455-5 0 106
2 23285 56.9938 43.3425 0009162 269.6198 90.3824 16.25130079 1182
The author's policy is to keep all element sets that are distributed
and to place them also in an archive file, typically now called
'sts-68.dat.all', as shown below. However, to insure that the most
recent TLE set is being read by 'tlexgen' and 'sattrack', there is only
the most recent TLE set in 'sts-68.dat'.
sts-68.dat.all:
STS-68
1 23285U 94062A 94273.71398473 .00126891 00000-0 63979-4 0 40
2 23285 57.0074 76.9956 0009327 267.4500 92.5492 16.19853975 52
STS-68
1 23285U 94 62 A 94274.82461727 .00202885 22808-3 11661-3 0 58
2 23285 57.0042 71.6434 0008860 272.7255 87.2792 16.20264410 233
STS-68
1 23285U 94 62 A 94276.12007817 .00177240 13808-4 93117-4 0 64
2 23285 57.0041 65.3969 0009364 282.2179 77.7835 16.20748183 445
STS-68
1 23285U 94 62 A 94276.67518413 .00136094 11322-4 71939-4 0 73
2 23285 57.0063 62.7154 0009256 276.8039 83.1971 16.20939096 537
STS-68
1 23285U 94062A 94279.63427997 .00194408 17535-4 92636-4 0 92
2 23285 56.9923 48.4133 0008893 293.0041 67.0089 16.22197025 1013
STS-68
1 23285U 94062A 94280.68166896 .00019593 12460-4 96455-5 0 106
2 23285 56.9938 43.3425 0009162 269.6198 90.3824 16.25130079 1182
Two-line element sets for space shuttle flights are also distributed
by the U.S. Space Command. That means there is an entry for e.g. STS-68
in tle.dat, the file transferred from 'archive.afit.af.mil'. Program
'tlexgen' will discard this entry and rather uses the first one from
'sts-68.dat' if the 'sts-68.dat' is listed before 'tle.dat' in
the input file 'tlelist.dat' in 'SatTrack/data', which is the input
file for 'tlexgen'. If you rather want to use the U.S. Space Command
data set, reverse the order of the file names listed in that input file.
Remember to always run 'tlexgen' after any kind of change was made to
these data files, in order to update the resource file 'tlex.dat'.
Typically, after a shuttle mission has been completed, the last TLE set is
also saved in 'sts.dat'.