The Planck observation strategy: constraints, scanning law and real-time challenges

Presented by Xavier Dupac
ESA-ESAC

(preference: talk)

Abstract:

The Planck spacecraft is the third-generation Cosmic Microwave Background space-based experiment.
Achieving unprecedented levels of sensitivity and angular resolution on the CMB fluctuations requires not only state-of-the-art technology, but also an optimal observation strategy. The Planck spacecraft operates with a number of constraints for pointing and sweeping the sky in large circles. These constraints must be taken into account to define the scanning law and the operational procedures to monitor the pointing performance, modify the scanning strategy according to pointing and instrument performance, re-observe areas where the signal to noise is too low, etc. In this talk I describe the way the Planck observation strategy was defined, which options were chosen for implementation, how it was monitored and modified, and how quick-reaction modifications were applied.