FITS incompatibility

[Mark de Regt]

I had been using CCDStack for many years, before recently switching to PI.

So I have extensive libraries of master calibration frames, created in CCDStack.

I am finding that when I process raw data, in PI, using the CCDStack master calibration frames, they don't work right in PI.  If I re-create the masters in PI, all is well.

Is this to be expected?

Thanks.

Mark

[Carlos Milovic]

It depends how you saved the masters. If it is using 32 floating point, then most probably it is an incompatibility generated by the use of a non-normalized dynamic range. You may load the masters with a permisive policy, manually divide them by 65535 (using PixelMath), and then save again. Also make sure that it has no pedestal values...

[Mark de Regt]

Ok