Re: Report On Getting Usable Observations With Inexpensive Equipment

From: Austin Godber via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 21 Dec 2019 10:01:16 -0700
Hi Scott,

That's an interesting idea.  Did that offset turn out to be pretty
repeatable and stable over time?

Austin

On Fri, Dec 20, 2019 at 6:08 PM Scott Tilley via Seesat-l <
seesat-l_at_satobs.org> wrote:

> Hi Charles
>
> I calibrated my camera by using the shutter sound and audacity to do the
> timing.   That way I was able to use the software that would trigger the
> camera And hear the shutter operation and know what the offset was. And set
> that into the image taking script to correct the time stamp.
>
> Regards,
> Scott
>
>
>
> Sent from my iPhone
>
> > On Dec 20, 2019, at 16:24, Charles Phillips via Seesat-l <
> seesat-l_at_satobs.org> wrote:
> >
> > ´╗┐All -
> >
> > This is an update on efforts to track satellites with inexpensive
> equipment - this can be done with only a small investment in
> > hardware. So far I have sent in six observations and have refined
> techniques quite a bit, learning that even quality cameras are
> > mass produced. It has proven to be difficult to get accurate timing with
> the DSLR that I have but there are several
> > improvements that I am going to use - I figured out (with help from a
> Digital Photography forum) how to set the time
> > in my camera from my computer. Manually setting the time with my older
> reflexes is not the best way to do it.
> >
> > Marco suggested calibrating the camera and I am looking at doing that -
> having a camera shop here calibrate the shutter
> > and electronics. The exposure time can be set in the camera controls but
> that appears to not be as accurate as I need.
> >
> > On all six observations - each is taken from one end of the streak in
> the image. The start observation appears to be of
> > better quality than the end observation and I think that my inaccurate
> timing is most of the error.
> >
> > One action I am going to take soon is to buy a new battery for the
> camera - the one I have is older and does not hold a
> > charge, especially when you are standing in a dark field in the cold.
> >
> > I am looking at getting a better camera and lens now that I know that
> this can be done in my area.
> >
> > Thanks to Chris Lewicki for helping me in this effort.
> >
> >
> > Charles Phillips
> > Spaceflight Research, LLC
> > Houston, Texas
> > 713-882-4578
> > sites.google.com/site/spaceflightresearchprojects/
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> > http://mailman.satobs.org/mailman/listinfo/seesat-l
>
>
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Received on Sat Dec 21 2019 - 11:01:59 UTC

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