During the concept phase of new space systems integrated and model based engineering is state of the art. The integrated way of working is already successfully implemented by using the Concurrent Engineering approach. For the model based concept studies technical discipline independent system models are needed. In the context of this work the present implementation of these system models from ESA and NASA as well as alternative system modeling possibilities such as UML and SysML are shown. Based on the present approaches and the experiences of the author the work presents a new modeling concept consisting out of an object-oriented way of system modeling, software architecture, and a data model. The new concept was implemented in a software tool, so that the author is able to point out the various possibilities during space system modeling and analysis by the new modeling environment.
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