Based on the GEMS Implementation Plan, outlined in section 6.5.2, the major milestones of the GEMS project occur approximately annually as as follows.. Chapter 8 provides detailed quarterly milestones for each Work Package and Task in the first 18 months

Month 12	Complete the scientific and technical build and validation of 3 separate assimilation systems for Greenhouse gases, Reactive gases, Aerosol. Complete acquisition of available data. Complete necessary functionality of web-site.
Month 24	Complete production and largely complete scientific scientific assessment of three different reanalyses for Greenhouse gases, Reactive gases, Aerosol. Make the validated reanalyses accessible to the outside world. Distribute feedback to data providers
Month 30	Complete the technical merge of the 3 assimilation systems into a unified system. Complete the scientific upgrade of the models and algorithms based on experiences of trial reanalyses
Month 42	Complete production of the unified reanalyses for Greenhouse gases, Reactive gases, Aerosol. Complete the build of the operational system, with operational interfaces to partners
Month 48	Complete the pre-operational trials. Complete the documentation and the scientific papers.

03-08-2005