On the call: Brendan, Eric, Julian, Ranajoy, Jacques, Colin

* S4 simulations: generation of map-based sims is ongoing. Validation of fisher forecasts looked fine in simplest cases. Now working on introducing effects that can't be done with a fisher forecast, such as more realistic foreground, more complicated noise. Eventually this effort might go to the time domain. Missing piece: way to scale from time domain to map domain to fisher (spectral) domain. Flauger is doing ILCs of map sims and then looking at spectra. Might want a fancier * what is probe-specific simulation plan Lloyd and Data challenge group has been set up based on same sky being used for S4, using zeroth order frequencies when using Probe, Planck, WMAP, etc..90 frequencies!!!!! use tophat bands for and nominal tophat bands plan to use fancier circular beams, using will use Hensley/Draine dust modeling, Lazarian sync model using same underlying MHD Kris has looked at one particular scan strategy for a probe (22,77..) and looked . * look at Litebird whitepaper Ted Kisner did a search through scan strategy parameter space against various metrics: Daily peak-to-peak dipole variation noise properties vs. HWP, Core looked more at individual detectors. look at with and without HWP