Re: Any idea when GPS 3 burns will occur?

From: Robert Holdsworth via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 19 Dec 2018 03:24:53 +1300
Projected launch time now 1434 UTC in the hope that upper level winds will
reduce sufficiently for launch. Window closes at 1437.

Robert

On Tue, 18 Dec 2018, 08:52 C. Bassa via Seesat-l <seesat-l_at_satobs.org wrote:

> On Mon, Dec 17, 2018 at 5:43 PM ronlee--- via Seesat-l
> <seesat-l_at_satobs.org> wrote:
> > 18 December 2018 launch on SpaceX Falcon 9.   Is there any information on
> > when burns will occur?
>
> The SpaceX timeline is published, see this tweet:
> https://twitter.com/TGMetsFan98/status/1074742779216097286
>
> SECO-1 is at 00:08:16 after launch, with the second burn starting at
> 01:08:51 and ending at 01:09:37 after launch. Spacecraft separation
> will be at 01:56:17. These timing suggest ~1 hour coast in a parking
> orbit, then a single burn into a transfer orbit, presumably with a
> ~20200 km apogee. There is a de-orbit NOTAM published, located in the
> South Atlantic, West of Africa, which is consistent with this launch
> profile, where the transfer orbit has its perigee at approximately 25
> deg South latitude. During spacecraft separation, and the subsequent
> CCAM/de-orbit burn, the stack is high above the Pacific between Hawaii
> and the US. Only Alaska may have visibility of the CCAM/de-orbit burn.
>
> Regards,
>     Cees
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Received on Tue Dec 18 2018 - 08:26:00 UTC

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