It would b interesting to hear a comment on the accuracy of the TLE for the long period orbits that are mentioned in this discussion. Paul Cefola On Fri, Apr 28, 2017 at 12:37 PM, Dr. T.S. Kelso via Seesat-l < seesat-l_at_satobs.org> wrote: > Hi Simone, > > As Cees points out, JSpOC does this regularly. We do track this on > CelesTrak at http://celestrak.com/NORAD/elements/predicted-tles.txt, if > you ever want to see which TLEs are involved. We have seen some with epochs > almost 30 days in the future. We track this because it can cause problems > for certain groups of our users. - TS > > Dr. T.S. Kelso > CelesTrak, https://celestrak.com > E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com> > > On 2017 Apr 28, at 00:56, satrack--- via Seesat-l <seesat-l_at_satobs.org > <mailto:seesat-l_at_satobs.org>> wrote: > > Hi All, > I've just noticed that some TLEs from Space Track have epoch in the > future. Is that usual?Does this simply mean that the TLE parameters have > been propagated for a future time? > As an example, object with Norad 20413 have epoch 17121, almost 3 days in > the future. > (I've also noticed that the age of high interest objects has increased). > Regards,Simone > > > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > -- *Dr. Paul J. CefolaConsultant in Aerospace Systems, Spaceflight Mechanics, & AstrodynamicsAdjunct Faculty, Dept. of Mechanical and Aerospace Engineering, University at Buffalo (SUNY)* *4 Moonstone Way* *Vineyard Haven, MA 02568* *USA508-696-1884 (phone on Martha's Vineyard)978-201-1393 (cell)* *paulcefo_at_buffalo.edu* <paulcefo_at_buffalo.edu> *paul.cefola*_at_gmail.com <paul.cefola_at_gmail.com> _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Apr 28 2017 - 12:09:23 UTC
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