An historical survey of communications satellite systems. II
Abstract
Advantages and disadvantages of passive reflector, low-orbit and geostationary satellite systems are discussed and experimental programs undertaken by Lockheed, NASA, and several European organizations to test advanced technical and operational features of communications satellites are outlined. Special attention is given to two aspects of the Intelsat program: DITEC-1, a system using digital techniques together with video signal processing to reduce TV signal bandwidth requirements by half; and an earth station antenna having a fixed toroidal section as main reflector. A review of the progress of Telesat Canada is given. The system will include three geostationary telecommunications satellites, two manned heavy route stations with 30 m dish antennas, and supplementary unmanned television and telecommunications stations equipped with 10-12 m antennas.
- Publication:
-
Telecommunication Journal of Australia
- Pub Date:
- 1975
- Bibcode:
- 1975TJAu...25...98B
- Keywords:
-
- Communication Satellites;
- Satellite Networks;
- Technology Assessment;
- Canada;
- Domestic Satellite Communications Systems;
- Histories;
- Intelsat Satellites;
- Military Spacecraft;
- Satellite Television;
- U.S.S.R. Space Program;
- Communications and Radar