SIM Lite: ground alignment of the instrument
2010
We present the start of the ground alignment plan for the SIM Lite Instrument. We outline the integration
and alignment of the individual benches on which all the optics are mounted, and then the alignment of the
benches to form the Science and Guide interferometers. The Instrument has a guide interferometer with only
a 40 arc-seconds field of regard, and 200 arc-seconds of alignment adjustability. This requires each sides of the
interferometer to be aligned to a fraction of that, while at the same time be orthogonal to the baseline defined
by the External Metrology Truss. The baselines of the Science and Guide interferometers must also be aligned
to be parallel.
The start of these alignment plans is captured in a SysML Instrument System model, in the form of activity
diagrams. These activity diagrams are then related to the hardware design and requirements. We finish with
future plans for the alignment and integration activities and requirements.
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