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The conceptual design of space systems may become extremely complex and usually demand a multidisciplinary team working together in order to effectively coalesce into a successful architectural design. However, due to pressure on cost and time, many space projects nowadays demand a cloud enabled environment as they undergo their development divided among several project partners, sometimes temporally and geographically separated hampering the information exchange and causing adding risks to its conception. This paper proposes an enterprise bus service (ESB), named SpaceESB, to realize this distributed environment by exposing the various processes of space mission conceptual phase using a Service‐Oriented Architecture (SOA) paradigm. As an example, a simple service related to propellant mass estimation is characterized by using BPMN (Business Process Modeling Notation) and Business Process Execution Language (BPEL). Its SOA materialization is implemented via a Java Web Service and its WSDL (Web Service Definition Language) provided as an interface to the SpaceESB.

This paper presents a systems concurrent engineering approach for the conception of an Attitude and Orbit Control System for a Satellite (AOCS). Systems Engineering uses a multidisciplinary approach in order to better understand complex systems and its processes, its products and its organization. The main goal is to satisfy all stakeholders involved in the product and its processes. In this paper several concepts of SystemsEngineering, as well as its methodology, were applied in the main processes of the life cycle of an AOCS of an artificial satellite, in order to give a better understanding of the development of this kind of product, from requirements analysis to system operation.