This document contains the publicly available information on the Galileo Signal In Space. It is intended for use by the Galileo Open Service (OS) user community and specifies the interface between the Galileo Space Segment and the Galileo User Segment.

It is published under the form of an open public consultation in order to improve and consolidate the  current draft document and to ensure that any further development of the Galileo OS SIS ICD takes into account the views of GNSS key stakeholders.

This process provides stakeholders with an opportunity to improve the quality and clarity of the document and to suggest new elements to be included in future versions, e.g. inclusion of multi-GNSS products and services.

It will contribute towards a smooth and rapid rollout of Galileo  equipment and applications, and the earliest possible delivery of user benefits.