5/6/2023
The committee gathered on June 5th. We reviewed progress on the work of the task force established to assess the impact of non-uniformity due to rolling based on extragalactic and cosmological science goals. We were pleased to hear that if commissioning and the first year of observations proceed as expected, then rolling should have minimal to no impact on photometric calibration. Work is underway to establish cosmological metrics quantifying the impact of rolling cadence on issues other than photometric calibration.
The committee reviewed changes in the OpSim current set of baseline simulations: a few improvements have been introduced in the opsim (a description is upcoming on community). Most of the proposed changes induce a significant impact on science metrics or they improve their throughput. New simulations that explore filter availability on the filter wheel and swap u with z/y based on moon phase were presented. The simulations produce significant improvements in SN cosmology. The impact of these changes on short time scale sampling, however, could not easily be assessed with existing metrics. The Opsim team is working on metrics for the assessment of changes of strategies on hour to 1-day time scale observations, and to understand what drives the significant improvement on SN DDF metrics. The SCOC expects to refine this updated baseline before the PCW. The SCOC continues to hold office hours on the last Monday of the month.