Chapters
 Power spectra and Likelihood
 motivation: a path to
cosmology
 ideal and actual
calculations
 Application to real life data
 short cuts and
approximations
 foregrounds, noises and
systematic effects
 data splits and
consistency tests
Abstract
I
will review the motivation behind the calculation of the CMB angular
power spectra, how it should be done, and how it is actually feasible.
Using the Planck experience I will then show some of the problems
affecting the high signal to noise regime expected in future
experiments, such as the residual noises and foregrounds, the
instrument and analysis related systematics effects, and the required
consistency tests. 
Bibliography
 Articles
 Efstathiou 2004
2004MNRAS.349..603E
 Planck 2015XI, 2016
2016A&A…594A..11P
