Experience and design drivers for the Inertial Sensor on the LISA Pathfinder Mission

This paper deals with the development of IS that will fly on board of the Laser Interferometer Space Antenna (LISA) Pathfinder mission. We summarise the engineering model development of the IS, in terms of technological solutions needed to map the scientific requirements into engineering specifications. And we present some spotlights on the main results of the Assembly, Integration and Test campaign. All these activities constitute a huge set of learnt lessons that drive the development of the subsequent flight model.