to The COMSAT Legacy Project, Advanced Communication Technology Satellite (ACTS) Program.
In October 1982, COMSAT formed Satellite Television Corporation (STC) to enter what was projected to be a $6 billion-a-year market.
Headed, by Irving Goldstein, who joined COMSAT in 1966, Satellite Television Corporation also was slated to market COMSAT's own
programming to the more than 20 million customers that the satellite television services were expected to attract. The foray into
satellite television services was expected to ultimately be a $1 billion undertaking for COMSAT.
In October 1982, the Satellite Television Corporation (STC), a subsidiary of the Communications Satellite Corporation (COMSAT),
contracted with RCA Astro-Electronics to design, develop, and manufacture the first direct broadcast satellite for use in the
United States. The contract is for two spacecraft with an early 1986 launch from either Kourou, Guiana, or Kennedy Space Center,
Florida. The program is on schedule with all designs finalized, component qualification virtually complete, and the first
spacecraft undergoing integration. Although the system will be implemented in phases, some recent design changes will permit the
two collocated satellites to deliver six DBS channels to the entire conterminous United States (CONUS), three channels per
satellite. Orbital location will be 110¡ W longitude, which is one of the eight orbit locations specified for the United States at
the Regional Area Radio Conference (RARC) in 1983. Each channel is designed to generate 220 W of RF power in the 12.2-12.7 GHz band
at the beginning of life; an allowance is made for TWTA efficiency degradation with life to provide 200 W of RF power at the end of
life. The three channels per spacecraft are provided whenever the spacecraft is illuminated by the sun, with no requirement for
eclipse operation. Each spacecraft has the capability to transmit in either of two different coverage configurations: it can
provide coverage to CONUS or to half-CONUS at an increase in e.i.r.p. of approximately 3 dB. This provides additional margin should
STC need the higher e.i.r.p. in the future or provides for a flexible time-zone coverage of the United States.
Currently, there are 6
photos in this collection,
Steven L. Teller
COMSAT Legacy Archives
20140 Scholar Drive
Hagerstown, Maryland 21742
Phone: (301) 892-6256
Fax: (651) 691-2940