This is an old revision of the document!

---

Attendance: Julian, Lloyd, Raphael, Al, Amy, Kris Gorski (for his presentation only)

Notes by Amy

Kris Gorski on Survey strategy (no slides)

EPIC scan strategy has large bore angle / good polarization scan angles / quickly covers the sky. But it required large sun shields and reduced the power per area from the solar arrays. CORE survey has a 120deg opening angle ring - donut on the sky precessing elliptically. Some similarities to WMAP but somewhat better crossing angles on each pixel. A scan strategy similar to Planck but with more continuous precession (less discrete) would be notably better than Planck. Kris also considering a “fantasy idea” - spacecraft spins with spin angle along Sun axis (simple, maximal power, maximal shaded volume for optics) and does not precess - instead add a moving mirror to optics. BEAST an example. But don't know about emissivity as a function of angle (large angles), and polarization propagation through such a system. Amy to arrange a meeting with a JPL optics expert to discuss these things.