This file photo shows examples of three-unit (3U) CubeSats. At about a foot in length and four inches wide, these are similar in design to IceCube and the five selected heliophysics CubeSats. (NASA)
Typically found at heights greater than 20,000 feet, cirrus clouds are composed of ice crystals, which IceCube will measure as the Science Mission Directorate’s first Earth-1 CubeSat mission. (NOAA Photo Library)
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