I apologize for the extended delay to answering your question, John. It has been a busy month completing the transition of CelesTrak to new servers in preparation for adding new capabilities. The best source of this type of data can be found on the NASA CDDIS site at: https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/gnss_mgex.html The data is in RINEX3 format. Please let me know if you have any other questions. - TS Dr. T.S. Kelso CelesTrak, https://celestrak.com E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com> On 2018 Jun 18, at 23:38, John Gerrard <blue_fire_england_at_yahoo.com<mailto:blue_fire_england_at_yahoo.com>> wrote: Dear Dr. Keslo Thank you for your worthy reply. Would you mind telling me where I can find the state vector or precise orbit of these satellites? Best Regards John Gerrard On Monday, June 18, 2018, 9:28:22 PM GMT+4:30, Dr. T.S. Kelso <ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com>> wrote: John, His best bet is to used one of the SBAS (Satellite-Based Augmentation System) satellites used with GPS. The US has WAAS and Europe has EGNOS and there are other similar constellations. Most provide high-precision ephemerides that can be used for this purpose. You can find a list of these satellites on CelesTrak at http://celestrak.com/NORAD/elements/sbas.txt. - TS Dr. T.S. Kelso CelesTrak, https://celestrak.com<https://celestrak.com/> E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com> On 2018 Jun 17, at 08:01, John Gerrard via Seesat-l <seesat-l_at_satobs.org<mailto:seesat-l_at_satobs.org>> wrote: Dear SeeSat members Someone wanted to evaluate the accuracy of his GEO observation setup and softwares against a reference. He asked me if there is any satellite with a position accuracy better than that of TLE. Do you know anyone? Best Regards John Gerrard _______________________________________________ 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 Mon Jul 23 2018 - 19:48:12 UTC
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