• cameo
• constellation
• lisa
• mbse
• montecarlo
• sysml

This work has been carried out at Airbus Defence & Space, Friedrichshafen, Germany, in the department "Advanced Projects-Science & Earth Observations", in the framework of the Laser Interferometer Space Antenna (LISA) mission. LISA is one of the most complex space missions ever planned by ESA/NASA aimed at detecting and studying Gravitational Waves.
The goal of the work presented in this thesis was to refine and further implement a system architecture model for LISA. In detail, modelling effort dealt with the implementation of an executable model of one of the most complex operational scenarios of the mission: the constellation acquisition, in which the three LISA spacecraft have to establish a laser link in between another across a nominal distance of 2.5 million km. The modelling effort has been done using SysML, an increasingly popular modelling language for Model-Based System Engineering (MBSE), and Cameo Systems Modeler.
Emphasis was put in computing the time needed to establish the constellation. That was done performing a Montecarlo simulation, including instrument units performances of low mission levels on high-level mission behaviours.