Constructed by SRI International in the early 1960s for the US Department of Defense, and located on land leased from Stanford University, the 150 ft diameter radio reflector antenna has become known locally as "THE DISH." At completion it was the third largest antenna of its kind in the world. At first it was used principally to beam signals to a number of very distant spacecraft (PIONEER) probing the solar wind in a joint SRI / Stanford project.	Extensive refurbishing and upgrades began in the early 1990s, and continue today, enabling expanded applications of the facility. THE DISH has unique capabilities in • Frequency coverage, • Tracking speed, • Extracting weak signals from noise, and • Transmitting range. Most recently THE DISH has been used for satellite calibrations, spacecraft command and telemetry, radio astronomy measurements, and weak signal detection and the related diagnosis of spacecraft conditions.   Recent Application Examples   Detailed Specifications   THE DISH Photo Gallery THE DISH is owned by the US government, operated and maintained by SRI International as custodian, and is available for collaborative activities to qualified users. Several programs with Stanford University, the USAF, NRL, and other government agencies are ongoing. Interested parties should contact Dr. Michael Cousins michael.cousins@sri.com Phone: 650-859-3341