Re: TLE for GPS III SV03 (Columbus)

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 28 Jun 2020 10:31:37 +0200
During the GPS III SV01 launch, also on a Falcon 9, I tracked the GPS
S-band beacon during the first pass over Europe and determined a rough
TLE from that. See
https://twitter.com/cgbassa/status/1076850608227926016?s=20

Propagating that TLE to the 2020-06-30T19:55:00 launch time at window
open gives this estimate:
1 75001U 20999A   20182.83560185  .00000000  00000-0  50000-4 0    03
2 75001  55.0000 115.1011 0789184  53.6145 357.4290 14.39464904    00

This TLE assumes that GPS III SV03 will follow a similar launch
trajectory as GPS III SV01, which is not clear to me at this point.
For SV01, SpaceX used two burns on the upper stage, first into a coast
orbit, then into the insertion orbit. This TLE is valid for the coast
orbit. When/if data becomes available on the de-orbit area of the
upper stage we can check if a similar launch profile is used for SV03.

Regards,
    Cees
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Received on Sun Jun 28 2020 - 03:33:17 UTC

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