This is one of mine. It's a special format I use (the '2' in position 9 of line 3 denotes 'format 2', my own invention) for cases which don't fit in the regular TLE format: specifically, where the central body is not the Earth (in this case the central body is 'Sun') and/or where the eccentricity is > 1 (not the case in this example). To accommodate the corresponding changes in the range of e and M values, I have added extra space in line 2 and made the decimal point explicit in the eccentricity. The other fields in line 3: the "UNK" is a tag for the data source (equal to NOR for older public NORAD TLEs and SPTR for modern, restricted-distribution Space-Track TLEs, UNK is unknown, I have also CSS for hobbyist elements (originally stood for Canadian Space Society, but includes Mike McCant's classified TLEs; JCM for approximate elsets of dubious quality that I have constructed personally; HOR for elsets derived from JPL Horizons data and some other cases.) The 'ELS93' is a reference for the source data file for the elset, usually a filename on my computer that'll be no good to anyone else. In this case it refers to a file of heliocentric orbital elements downloaded from the GSFC NSSDC web site in 1993. The '3' line is distinct from the '0' line used by some other providers; I usually don't bother with the 0 line but it is legal to include it. - Jonathan On 21 May 2014 14:49, wkitty42_at_gmail.com via Seesat-l <seesat-l_at_satobs.org> wrote: > > can someone help me to figure out the following historical 3LE of ISEE-3 > (Norad 11004 COSPAR 1979-079A)? i understand that line 3 is line 0 but line > 2 is throwing me off... > > 1 11004U 78079A 85254.41667000 0.00000000 +00000-0 +00000-0 0 19 > 2 11004 0.1232 68.5250 0.0538698 118.9910 188.6817 > 0.0028217899 > 3 11004 2 UNK Sun ELS93 > > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Wed May 21 2014 - 14:07:10 UTC
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