PSST QUB requirements and notes (draft) --


Processing products --
 * WS diffim catalogs on datastore
 * PSS and rapid updates for historical stamps (warp+stack+diff)

Processing timescale --
 * 


Tasks to do --
 * switch to PV3 stacks for grizy
 * w-band stacks -- PV3 and gri synthetic
 * gpc2 import of PV3 stack products
 * WSdiff test set