Satellite news gathering, cable television distribution, video conferencing, newspaper
transmission, business applications, and banking services are being delivered to Japanese
customers by the two SUPERBIRD satellites built for Space Communications Corporation (SCC)
of Japan by Space Systems/Loral (SS/L).
The geostationary SUPERBIRD has 23 transponders that operate in the Ku-band, at 50 and
85 Watts, three Ka-band transponders at 29 Watts, and two X-band transponders at 47 Watts.
Total on-board prime dc power is 4,000 Watts.
SUPERBIRD-1 (A1) was completed in 23 months and delivered on orbit in March, 1992.
SUPERBIRD-2 (B1) was completed in 19 months and delivered on orbit in February, 1993, both from
the European Space Center at Kourou, French Guyana. Control after launch was provided by
SS/L's Mission Control Center in Palo Alto, Calif., until completion of check-out in
orbit, after which control was passed to SCC.
The SUPERBIRD spacecraft is based on SS/L's threeaxis, body-stabilized SSL-1300 bus, whose modular design has proven its
worth during some 275 years of cumulative on-orbit service, close to 45% of the total of
630 plus years amassed by SS/L satellites to date.
The SSL-1300 buses achieve long useful
orbital life - in this case 10 years - through use of a bipropellant propulsion system and
a momentumbias system for excellent stationkeeping and orbital stability. Solar arrays and
nickel-hydrogen batteries provide uninterrupted electrical power.
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