Re: Space-X Transporter-2 chain pass over UK on fourth orbit

From: Andreas Hornig via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 10 Aug 2021 21:47:20 +0200
Hey Cees,

On Tue, Aug 10, 2021 at 2:54 PM C. Bassa <cgbsat_at_gmail.com> wrote:

> Hi Andreas,
>
> If you are interested I can share some raw video frames from my
> ASI1600MM Pro, which is an astronomical CMOS camera.


Sure! I would try my algo with them, too :).


> These are
> 1552x1172 pixel images at 100ms integration times, are timestamped,
> and contain many satellites. These images were used for the
> observations reported in
> http://www.satobs.org/seesat/Apr-2021/0147.html


Cool, then we can counter check with what my tool chain will produce in the
very end :).


>
>
> I would expect an astronomical CMOS camera to perform better than a
> digital DSLR, as the astronomical camera uses monochrome sensors and
> does not use compression or any non-reversible image processing on the
> frames.


I would assume the same. I don't have much insight into your camera. But
the controlled temperature and the monochrome sensor have their perks for
sure.


> The added bonus is the accurate timestamps of each individual
> frame, which is crucial for satellite tracking.
>

Do you know how precise they are? How are they synched?

I would still try with the A7S because I would have other use cases for it
:D beyond astrophotos and also I would add time sync via a raspi controlled
gphoto logging the time of start and stop of the photo/video. It's worth a
try to see how deterministic this is.

Best regards,

Andreas
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Received on Tue Aug 10 2021 - 14:49:15 UTC

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