Chapter 3 Pre-processing

Author(s): Javier Castañeda, David Hobbs, Claus Fabricius, Michael Davidson, Nicholas Rowell, Lennart Lindegren, Nigel Hambly, Uli Bastian, Jordi Portell, Ferran Torra, Marcial Clotet, Ricky Smart, Alcione Mora, Michael Biermann, Wolfgang Löffler, Anthony Brown, Deborah Busonero, Alberto Riva