A two-line element set (TLE) has the following structure. "[.]" indicates the location of an implied decimal point. Unused columns are blank. Leading zeros may or may not be present.

Example:

1 25063U 97074A   01065.47684936  .00084763  00000-0  56564-3 0  9843
2 25063  34.9848 213.3710 0001408 234.2325 124.0029 15.74091534188368

Columns Content Format Example
Line 1
1 Sequence number ("1") d 1
3-7 Satellite number ddddd 25063
8 "U" c U
10-17 International designator yynnnppp 97074A
19-20 Epoch year dd 01
21-23 Epoch day ddd 065
24-32 Epoch time as a fraction of a day .dddddddd .47684936
34-43 1st time deriv. of mean motion or bal. coeff. s.dddddddd .00084763
45-52 2nd time deriv. of mean motion or blank s[.]dddddsd 00000-0
54-62 BSTAR drag term or rad. pressure coeff. s[.]dddddsd 56564-3
63 Ephemeris type d 0
65-68 Element type dddd 984
69 Mod-10 checksum d 3
Line 2
1 Seqence number ("2") d 2
3-7 Satellite number ddddd 25063
9-16 Inclination in degrees ddd.dddd 34.9848
18-25 R.A. of ascending node in degrees ddd.dddd 213.3710
27-33 Eccentricity [.]ddddddd 0001408
35-42 Argument of perigee in degrees ddd.dddd 234.2325
44-51 Mean anomaly in degrees ddd.dddd 124.0029
53-63 Mean motion in revs per day dd.dddddddd 15.74091534
64-68 Revolution number at epoch ddddd 18836
69 Mod-10 checksum d 8

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