by John Swaren
| January 9, 2015
A bus (or payload) can have just one subsystem-assembly pairing, with all components listed below, rather than multiple subsystems (or instruments) each with multiple separate pairings.
In general, note that the Space Assembly under each Space Subsystem captures the support from the Subsystem to the Space System (S/C or Observatory), whether the Subsystem is integrated prior to system delivery or integrated directly to the S/C. Not including a Space Assembly within each Subsystem would result in an overall I&T underestimate.
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