Design for a portable calibration system for the Full-sun UV Rocket SpecTrometer instrument

The Full-sun Ultraviolet Rocket SpecTrograph (FURST) is a sounding rocket designed to acquire the first full-disk integrated high resolution vacuum ultraviolet (VUV) spectra of Sun. data enable analysis Sun comparable stellar measured by astronomical instruments such as those on board Hubble Space Telescope. mission jointly operated teams at Montana State University (MSU), developing instrument, and Marshall Flight Center (MSFC), camera calibration systems, scheduled launch from White Sands Missile Range, New Mexico, in 2022. This requires development pre- post-launch plan for absolute radiometric wavelength reliably generate analogue spectra. Absolute calibration, though initially planned be performed National Institute Standards Technology (NIST) facilities, now completed with portable VUV system provided MSFC, due instrument incompatibilities NIST infrastructure. developed provide track changes over duration mission. composed mainly collimator equipped an extreme line source calibrated photodiodes. accommodate both repeatable testing FURST various test sites before after launch. Presented here are requirements, design, implementation this focus features most significant measurements.