The benefits of on-orbit servicing have clearly been demonstrated by the Hubble Space Telescope (HST). However, HST is a point modular design and cannot be easily generalized to other telescopes. Thus, it is necessary to develop a baseline modular design so future space telescopes can also benefit from servicing by easily incorporating modularity. The tool presented here is developed to easily compare different architectures based on the following input parameters: type of interferometer, mission lifetime, number of apertures, level of modularity, and reason for servicing. The tool takes in the type of interferometer and distributes components based on input parameters. The tool employs a time simulation to step through the mission and randomly fail components. When a part has "failed", a servicing mission is planned based on the type of component that has failed, size/mass specifications of the failed part, and parts likely to fail soon. Different architectures can then be compared using the following metrics: characteristics of servicing missions; overhead mass; number of modules; number of interfaces; and location of interfaces. Initial results show minimal influence of the number of apertures on type of modularity, though the type of interferometer does lead to different trends in modularity level.
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