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On the call: Eric, Brendan, Joy, Ranajoy, Maurizio, Jacques, Colin,

Agenda / Notes: * Probe study purpose: inform NASA and 2020 Decadal Survey panel, * Big Picture look at the systematics list

• do we agree that the risk factor=5 items are really the riskiest effects? Did we miss anything?
• Items that got a 5 in SRF:
  • Sidelobes:Reflector spillover
  • Sidelobes: Stray reflections
  • Sidelobes: surface roughness
  • Beam ghosting
  • Scattering
  • Sidelobes: diffraction
  • Polarization Angle calibration: maybe rated too high? we do have the workaround that sacrifices the cosmic bifringence. No matter what, we should write down a calibration
  • Gain stability: for CORE, looked at how well calibration could be done on the dipole, but not propagated to science errors. Should also look at ability to use CMB anisotropy
• Beam mismatch leakage: need to mention this for sure, since it is a big issue, and perhaps other work can be cited should probably be studied here because
• All of these effects
• will instrument design
• optical simulations? probably not super detailed, but a fairly general systems model can be very powerful
• action for Brendan to come up with generic model, should cover most of the effects listed above.
• Maurizio would be happy to do this using CORE setup, but he's busy with LSPE until December. He'd like to use TOAST,