Hi @srosenfraz,
Let me try…
1) The creation of 2 bad pixel maps would happen if the instrument name of the darks and or flats are not equal. The Bad Pixel Map will be matched with lights or flats of the same instrument.
Sometimes, different capture programs will output different isntrument names, so be aware of this.
And there is a good and simple solution to this:
in 9) tools, I have made the batch modify tool (made especially for the conversion of your old IP data ;-) ). You can adjust the instrument name in the fits header of a batch of files. Make sure that you modify it exactly to the instrument name of your lights. And when you create a bad pixel map, check that all files have the correct instrument name.
The batch modify tool will output new files with the proposed changes.
Regarding the BPM, in the fits header you’ll find info about the hot/cold and linear pixels that were detected.
pixels with a value of 0 are cold
pixels with a value of 127 are linear
pixels with a value of 255 are hot
In my experience, the amount of pixels that are hottish, can vary from 0.01 to as much as 1% and more with older sensors.