The next-generation series of Boeing Tracking and Data Relay Satellites (TDRS) will increase NASA’s signal processing and transmission capabilities among the Hubble Space Telescope, the International Space Station and dozens of unmanned scientific satellites in low Earth orbit. TDRS K, the first to offer that increase in operational effectiveness, completed all environmental, functional and performance tests, including vibration and acoustic tests and final flight functional testing in October 2012. TDRS L and M are also in production. Boeing built the TDRS H, I and J satellites that are currently in operation.