Preliminary optical performance of the SPRITE CubeSat instrument

The transition from neutral to ionized intergalactic medium (IGM) is one of the key signifiers of cosmic structure formation. The mass and energy flows within galaxies are also dominated by ionization and kinematic processes. The Supernova remnants/Proxies for Reionization and Integrated Testbed Experiment (SPRITE), a 12U CubeSat, will investigate these tracers of galactic and cosmic structure. The innovative optical coatings utilized on SPRITE also allow it to serve as a demonstration testbed for a future large (>6m) ultraviolet/optical/infrared surveyor. We demonstrate that these coatings provide high throughput with low environmental degradation. We also present the results of component-level testing and instrument characterization of the SPRITE instrument.