The European Ground System Common Core (EGS-CC) is an initiative undertaken as a formal collaboration of ESA, European National Agencies and European Prime Industry. The design of the EGS-CC is component based and following a service oriented architecture. Phase C/D is underway and is being carried out by a complex industrial consortium including twenty teams developing components in parallel across ten countries. The EGS-CC products are being developed through a fast incremental lifecycle and intermediate releases are being made available to stakeholders who are already initiating the integration of EGS-CC into their respective infrastructures. The EGS-CC products will also be distributed to end users who will often need to extend EGS-CC products and develop applications based on it. This imposes very demanding requirements on the Software Development Environment (SDE). Some of the requirements on the SDE come from organisational constraints: there are different types of users, i.e. individual developers, industrial development teams, the EGS-CC Consortium Prime, ESA, the EGS-CC stakeholders and the end-user projects. Other constraints come from the need to be adaptable and flexible in the development to match, as far as possible, the needs of the stakeholders in their own development activities. Finally, since the EGS-CC will be made available as ESA Community open source software, i.e. free, the procurement cost of the associated SDE must be minimised.
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