Migrating some QLF items from desihub/desispec#708, originally about CHECKHDUS which is now deprecated:
From emails discussions, the conclusion was basically to drop CHECKHDUs, since ICS will be handling the equivalent alarm condition of missing data.
The consequence for QLF:
don't check for CHECKHDUs anymore; it will be removed from a future version of QL output
it should check the input raw data file desi*.fits.fz for which cameras exist, and spawn QL only for those cameras
any cameras that are not in the input files should just be grayed out for the display
QLF should cache the results of what it found for each exposure, so that it doesn't have to re-read the desi*.fits.fz file just to know what cameras should be gray vs. displayed every time the webpage is loaded.
Note: it will be possible that 1 or 2 cameras for a spectrograph will exist, even if the 3rd camera is broken, e.g. having b2 and z2 but not r2.
Migrating some QLF items from desihub/desispec#708, originally about CHECKHDUS which is now deprecated:
From emails discussions, the conclusion was basically to drop CHECKHDUs, since ICS will be handling the equivalent alarm condition of missing data.
The consequence for QLF:
Note: it will be possible that 1 or 2 cameras for a spectrograph will exist, even if the 3rd camera is broken, e.g. having b2 and z2 but not r2.