A short balloon flight commissioned a fluorescence and a Cherenkov telescope at 33 km altitude and returned about 10 candidate cosmic-ray extensive air shower events from Cherenkov light.
UCIRC2: An Infrared Cloud Monitor for EUSO-SPB2
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abstract
We describe the design and implementation of the University of Chicago Infrared Camera 2 (UCIRC2) built for monitoring cloud coverage during the EUSO-SPB2 flight (the second generation of the Extreme Universe Space Observatory on a Super Pressure Balloon). UCIRC2 uses two infrared (IR) cameras centered on 10$\mu$m and 12$\mu$m wavelengths to capture images of the clouds beneath EUSO-SPB2 in two bands spanning the thermal emission peak. Taken every minute, the IR images allow the determination of the height and coverage of clouds between the telescope and the ground. We discuss the design and construction of UCIRC2, including the techniques and design principles that make the module temperature and vacuum resilient. Additionally, we delineate the image reconstruction process and the pixel by pixel temperature calibration procedure. This paper will posit design and implementation suggestions for future ultra-high energy space telescopes.
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The Extreme Universe Observatory on a Super-Pressure Balloon II: Mission, Payload, and Flight
A short balloon flight commissioned a fluorescence and a Cherenkov telescope at 33 km altitude and returned about 10 candidate cosmic-ray extensive air shower events from Cherenkov light.