NIGHT

$DESI_SPECTRO_DATA/NIGHT

Default $DESI_ROOT/spectro/data/NIGHT

NIGHT is the night of observation in YYYYMMDD format. The “night” roles over at noon local time, so all data taken between sunset and sunrise belong to the same night (i.e. the date of the sunset). Under each night, data are grouped in subdirectories by exposure ID (zero-padded 8-digit).

• EXPID