In the early 1960's, international communication satellites using the 6/4 GHz bands and positioned in the geostationary satellite orbit were found to be capable of providing high quality telecommunications services. Domestic satellite communications systems were planned and were implemented, beginning in 1972, with the Telesat Canada ANIK-A System.
"Historical Development: Hermes Satellite,"
Online Journal of Space Communication: Vol. 2
, Article 6.
Available at: https://ohioopen.library.ohio.edu/spacejournal/vol2/iss4/6
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