UNIQPIX
Note: new in Matterhorn / Nevis / DR3; not yet public.
Default $DESI_ROOT/spectro/redux/SPECPROD/spectra/SURVEY/PROGRAM/PIXGROUP/UNIQPIX
SURVEY = sv1, sv3, main, …
PROGRAM = dark,bright,backup,other
UNIQPIX = HEALPIX + 4*NSIDE^2 adaptively sized pixel
PIXGROUP = int(UNIQPIX/100)
The available files and formats are the same as those in the
healpix directory tree
with the addition of a UNIQPIX header keyword.