PHASE

PHASE is a specific DESI observational phase, which can include “mainX” for iterations of the DESI Main Science Survey, “svX” for iterations of Survey Validation and “cmx” for commissioning, where X is an integer.

Under each phase, QA webpages are stored in directories that resemble {PHASE}desitargetQA-{DR}-{OBSCON}-{VERSION}. Here, PHASE is a specific DESI observational phase (e.g. svX with X=1,2,3 for iterations of Survey Validation), DR is the Legacy Surveys Data Release associated with the targets and randoms used to build the pixweight files on which the QA is based, OBSCON is the observing condition (or “layer”) for the targets (e.g. dark), and VERSION is the version of the desitarget code used to generate the QA. For targets that are part of the DESI Main Science Survey PHASE is omitted from the filename.

Clicking on these QA directories (or the associated {PHASE}desitargetQA-{DR}-{OBSCON}-{VERSION}/index.html page) will display the QA webpages.