Spacecraft analysis, MSAS-a multi-mission solution

This paper describes the design of the JPL institutional Multi-Mission Spacecraft Analysis System (MSAS) its initial adaptation to the Cassini mission and adaptation strategies for smaller missions. Also discussed is the relationship of MSAS to the Flight Engineering Service paradigm proposed for support of future missions Fundamental to the MSAS design is the concept of a spacecraft state and the ability to define, track and manipulate spacecraft state information with a variety of analysis tools. The processing of this state information in a consistent manner from application to application is central to automating the spacecraft analysis tasks. A basic element of the MSAS design is an environmental core, which provides analysis capabilities, required by every mission and many operational elements of a flight team. The MSAS core design directly supports, in a seamless manner, the development of mission specific applications that reflect unique subsystem analysis requirements. The paper concludes with a discussion of the adaptation strategies of MSAS to smaller missions and describes the role of MSAS in the Flight Engineering Services paradigm being used at JPL to support multiple missions