How Umbra works

1. 00

   Conversion

   Raw files to calibrated and debayered FITS.

2. 01

   Alignment

   Every frame aligned twice: once on the moon, once on the corona.

3. 02

   Stacking

   Noise averaged out, with no ghosting from the moon's drift.

4. 03

   HDR

   Bracketed exposures merged to recover the corona's dynamic range.