The Contact Scheduling Process of the Galileo Navigation System

  • Authors:

  • Tiago Franco;Flávio Moreira;Stewart Hall;Henrique Oliveira

  • Affiliations:

  • Critical Software S.A.,;Critical Software S.A.,;SciSys,;Critical Software S.A.,

  • Venue:
  • IEA/AIE '08 Proceedings of the 21st international conference on Industrial, Engineering and Other Applications of Applied Intelligent Systems: New Frontiers in Applied Artificial Intelligence
  • Year:
  • 2008

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Abstract

Galileo [1] is a joint initiative of the European Commission and the European Space Agency (ESA) for the development of a Global Satellite Navigation System. This system will provide a highly accurate, guaranteed global positioning service under civilian control. The fully deployed Galileo system consists of 30 satellites (27 operational + 3 spares) and 5 globally distributed ground stations. The Spacecraft Constellation Planning Facility is the element responsible for generating the plans of contacts between satellites and ground stations for the entire constellation for the purpose of maintenance and corrective actions. This element includes the Contact Scheduler, the component with the scheduling functionalities of generating conflict free Contact Plans. This document describes the Galileo's contact scheduling problem, the design and implementation of the scheduler and the validation results.