As one of the service products, CAMS is currently producing a global reanalysis of reactive trace gases, greenhouse gases and aerosol concentrations (Inness et al., 2018). The production of the reanalysis has started early 2017, and the period 2003-2017 was completed in October 2018. This document presents the validation results for the 15-year reanalysis run, 2003 - 2017, focussing on aerosols and reactive gases. Earlier versions of this document have appeared during the production of the reanalysis: after completing year 1 (2003), year 5 (2003-2007) and year 14 (2003- 2016).