

Spacecraft
Manufacture: Lockheed Martin
Platform: A2100
Minimum lifetime: 15 years
Liftoff mass : 4600 kg
Total power at End of life: 11.3 kW
Payload power: 8.1 kW
No. of transponders: 54 (52 Ku-band and 2 Ka-band)
Frequency Plan
Downlink (GHz) Uplink (GHz)
BSS Nordic and ECEE 11.70 – 12.50 17.30 – 18.10
FSS Nordic and ECEE 12.50 – 12.75 14.00 – 14.25
FSS Africa 12.50 – 12.75 14.00 – 14.25
Ka Interconnect
(Africa to Europe) 19.7 -19.95 or
21.5 – 21.75 14.00 – 14.25
Ka Interconnect
(Europe to Africa) 12.50 – 12.75 29.15 – 29.40
Ka Interactive 18.80 – 19.30 29.50 – 30.00



http://www.ses-sirius.com/satellites/sirius-4/