The Steerable S-Band Antenna was part of a system used by the crew of the Apollo Lunar module to communicate with the astronaut on board the Command Module, and to National Aeronautics and Space Administration (NASA) ground stations. The system operated in the "S-Band" of frequencies: between 2,000 and 4,000 MHZ. The antennas were built by contractor Dalmo Victor, a Textron division. Solar Division of International Harvester was subcontracted by Dalmo Victor to provide reflectors for the Steerable S-Band Antenna System due to the company's expertise in working with advanced materials, specifically because of the extreme high temperature and stress specifications that the reflectors would need to meet. Peter Taggett was a member of the Research Lab at Solar who worked on the development of the reflectors.