IceCube is a 3U CubeSat funded by NASA for spaceflight demonstration of a commercial 883-GHz cloud radiometer. The satellite has produced the first global atmospheric ice map at the 883-Gigahertz band, an important frequency in the submillimeter wavelength for studying cloud ice and its effect on Earth’s climate. The IceCube team is a winner of the Robert H Goddard Exceptional Achievement Award for Engineering in 2019.