The BRRISON mission launched an IR camera and two visible imagers using the same 0.8 m diameter telescope on September 29, 2013. The 5200 pound gondola and telescope assembly flew up near 130,000 feet above the New Mexico/Texas desert attempting to view the newly discovered ISON comet. The objective of the mission was to take visible images of ISON and take water and carbon-dioxide observations using the IR camera. In order to resolve these compounds, the IR camera optics needed to be cold (below -70 C), while the detector needed to be very cold (below -200 C). While getting these items cold in space is routinely accomplished, getting optics cold and keeping water vapor in the air from condensing on the surfaces and obscuring the measurements is anything but routine. This paper discusses the method developed to cool the detector and camera optics down to operating temperatures, while maintain everything frost free.
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