This report is the Deliverable 3 . 1 R - WAKE System Design Document , resulting from WP3 activities. It provides details on the design of the resear ch methodology, simulation fram ework and validation activities, as described in previous deliverables D2.1, D2.2 and D2.3, and whose contents are updated in this document with an incremental perspective and with the appropriate level of detail for this sta ge of the project. The R - Wake project addresses the SESAR 2020 Exploratory Research work - programme topic ER - 07 - 2015 - Separation Management and Separation Standards , within the area of Advanced Air Traffic Services (ATS). The R - Wake project overall object ive is to investigate the risks and hazards of potential wake vortex encounters in the en - route airspace, in current and futuristic operational scenarios, in order to assess the potential enhancements to the Separation Standards and Separation Management m ethods in Europe .