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The CAMS series of validation reports covering the global NRT forecast and analysis system as well as the CAMS reanalysis are available on the CAMS validation reports page.
The CAMS Verification of Global Services is documented here.
The older MACC II and MACC III series of validation reports covering the global NRT forecast and analysis system as well as the MACC reanalysis are available on the MACC validation reports page. More deliverables are also available on the MACC III validation deliverables page.
The Verification of Global Services for the MACC II and MACC III phases is documented here.
Lefever et al. (ACP, 2015) describe, compare, validate and discuss the analyses of stratospheric ozone delivered in near-real time between 2009 and 2012 by four different data assimilation systems: IFS-MOZART (which generated the MACC o-suite at the time), BASCOE, SACADA and TM3DAM. It is shown that the characteristics of the assimilation systems are much less important than those of the assimilated data sets. A correct representation of the vertical distribution of ozone requires satellite observations which are well resolved vertically and extend into the lowermost stratosphere.