Criteria to start the Legacy Survey of Space and Time

Abstract

This document concisely captures the criteria that must be satisfied by the Rubin Observatory System to begin regular survey operations for the Legacy Survey of Space and Time (i.e. to begin execution of the planned 10 year survey strategy currently documented in PSTN-056). The survey can start based on quantitative criteria described herein. The system contribution to the delivered image quality must reliably be better than 0.45$\hbox{$^{\prime\prime}$}$ and the effective survey speed must be 0.7 or better. Both of these are attainable given our experience and knowledge of the current on sky system.