Location: SLAC 

Participants:

George Angeli

Andrew Connolly

Mike Jarvis

Josh Meyer

Aaron Roodman

Michael Schenider

Chris Walter

Bo Xin

Presentations:

LSST Overview: Actuators, Perturbations, Controls, and Metrics

Linear optical model for a large ground based telescope

Action items:

• Aberration modeling
  • Check the accuracy of the assumption of linearity in the sensitivity matrix
    • Bo will give Aaron and Michael the sensitivity matrices he has derive
    • Michael will interpolate to a new position see if his predicted values are “better” (better means doesnt impact the PSSN by more than 10^-3)
  • Compare the Galsim wavefront sensor simulations 
    • Michael will compare the wavefront images using the LSST Zemax model (from Aaron) 
    • Once this comparison is complete Bo will provide Michael zemax images and the zernicke coefficients and Michael will compare
• Optical model
  • Provide GalSim with spider description (either from phosim or the latest model) and post on confluence page
• Atmospheric modeling
  • Josh validate his model comparing against Arroyo, looking at structure function, dependence on screen size
  • Provide Josh with the distributions for the wind velocities and directions, CN2 (either from phosim or somewhere else)
  • Possible to use Josh's work to validate effects of assuming photon based approach for the atmosphere (after it is validated) but recognizing that phosim has done many of these tests