Overview of Telstar and the world’s first satellite TV broadcast
The world’s first satellite television broadcast took place on July 11th 1962 when the Telstar satellite relayed an image of a flag outside its base station at Andover Earth Station to the Pleumeur-Bodou earth station in France.
The 190 French technicians successfully tracked Telstar during the 20 minute period that Telstar was visible to both the USA and France and watched the broadcast at 47 minutes past midnight. The first public satellite broadcast took place almost two weeks later, on July 23rd.
Telstar was launched almost five years after the first artificial satellite, Sputnik, was put into low Earth orbit by the USSR. For this reason Telstar is seen as being part of the Space Race between the USA and the USSR, but it’s interesting to note that Telstar was actually an international project to develop trans-Atlantic communication involving AT&T, Bell Telephone Laboratories and NASA in the USA as well as the GPO and National PTT who were responsible for communication technology in the UK and France respectively.
Telstar was launched from Cape Canaveral in Florida on the day before the first broadcast, with costs shared between the international partners. Telstar was therefore also the first privately sponsored space launch. However, despite partly being a product of the Cold War it was also a victim. High-altitude nuclear tests had created artificial radiation belts that overwhelmed the electronics on Telstar and led to irreparable damage that caused the satellite to completely fail nine months later. By the time it went out of service, Telstar I had relayed over 400 separate transmissions.