Author Topic: SubframeSelector System Parameters  (Read 783 times)

Offline rleisenz

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SubframeSelector System Parameters
« on: 2015 October 16 02:40:56 »
I want to give the SubframeSelector script a try on my last subs i created (140 x 600s).
In the System Parameter part is asked for the camera gain.
I wonder which value is meant. Is it the value which i get by running
the BasicCCD Parameter script? Is the value dependant on the Gain settings of the driver?
I use a QHYCCD 9m and the documentation gives a value for the System gain of 0.4e-/adu (at gain=0).
So if i push up the gain in the driver to lets say 10, is that of importance for the SubframeSelector script?

Maybe someone can clarify this.
Thanks
Robert
G11/Gemini2 on pier; 8"f4 Newton; ED80;80/480 APO; EOS1000Da; ALCCD9m; QHY6pro; ALCCD5LII-M;

Offline mschuster

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Re: SubframeSelector System Parameters
« Reply #1 on: 2015 October 16 07:20:43 »
Robert,

You may choose either e- or DN units for the measurements Median, MeanDeviation, and Noise by selecting System Parameters > Data unit. If you choose e- units, you must also set a value for System Parameters > Camera gain. On the other hand, if you choose DN units, then the value of System Parameters > Camera gain is not used by the script.

If you do choose e- units, then use whatever gain value you think best characterizes your detector. If you are not sure, then just use DN units. The selected unit will appear in the Table, Plots, and Expressions sections of the script.

Thanks,
Mike

Offline rleisenz

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Re: SubframeSelector System Parameters
« Reply #2 on: 2015 October 16 10:52:04 »
Hi Mike,

thanks for your support. Just installed Linux an PI and it really runs faster.

Thank you for your great scripts!

Robert
G11/Gemini2 on pier; 8"f4 Newton; ED80;80/480 APO; EOS1000Da; ALCCD9m; QHY6pro; ALCCD5LII-M;