History of television This was published in the October 1945 issue of the Wireless World magazine and won him the Franklin Institute's Stuart Ballantine Medal in 1963. The first satellite television signals from Europe to North America were relayed via the Telstar satellite over the Atlantic ocean on July 23, 1962. The signals were received and broadcast in North American and European countries and watched by over 100 million. Launched in 1962, the "Relay 1" satellite was the first satellite to transmit television signals from the US to Japan. The first geosynchronous communication satellite, Syncom 2, was launched on July 26, 1963. The
Satellite data unit Satellite data unit A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network. It is an integral part of an aircraft's SATCOM (satellite communication) system. The device connects with a satellite via ordinary radio frequency (RF) communication and the satellite then connects to a ground station or "vice versa". All satellite communication whether audio or data is processed by the SDU. The SDU communicates with an onboard MDDU (multi-purpose disk-drive unit) which maintains an updatable table of ground stations in the aircraft's current area and the order of preference