imaging survey strategy

I spent some time discussing with Stephanie Wachter (MPIA) the Euclid calibration strategy and survey requirements. I think that Euclid (and all surveys) should do something like the "strategy C" in the paper on survey strategy by Holmes et al. Indeed, I think that strategy C would not only lead to far better calibration of Euclid than any of their current survey strategy ideas, I think it would make for more uniform solid-angular coverage, better time-domain coverage, and greater robustness to spacecraft faults or issues.