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Technical Info
Astra 4A


Sat Name  Sirius 4 >>> Astra 4A
Orbital location  5° East
Status  Geostationary
Coverage  South Africa, Europe, Russia
Operator  SES Sirius AB (ex Nordiska Satellitaktiebolaget, NSAB)
Satellite Manufacturer  Lockheed Martin
Launch Site  Baikonur Cosmodrome
Launch Vehicle  Proton-M Briz-M (Ph.1)      Serial: 535-23
Bus  A2100AXS
Launch date  18.11.2007
Design Life  15 years
Uplink Frequency
 Ku-band: 14.00 – 14.25 GHz (FSS)
               17.30 – 18.10 GHz (BSS)

 Ka-band: 29.15 – 29.40 GHz
               29.50 – 30.00 GHz

Downlink Frequency
 Ku-band: 11.70 – 12.50 GHz (BSS)
               12.50 – 12.75 GHz (FSS)

 Ka-band: 18.80 – 19.30 GHz
               19.70 - 19.95 GHz
               21.50 – 21.75 GHz

Beacon Frequency
 Ku-band: 11.702.500 V
               12.498.500 H

Polarisation  Ku-band: Linear
 Ka-band: Linear
Total Transponders
 Total: 52 Ku-band, 2 Ka-band

 Ka-band: (Interconnect) : 1 (250 MHz)
               (Interactive)    : 2 (125 MHz)

 Ku-band: Europe: 40 BSS (33 MHz) + 6 FSS (72 MHz)
               Africa  : 6 FSS   (36 MHz)


Astra 4A
Ku-band beam

Astra 4A
Ku-band beam

Astra 4A
Sub Saharan Africa
Ku-band beam

Astra 4A
Europe Interconnect
Ka-band beam

Astra 4A
Europe Interactive
Ka-band beam


The information on this page is obtained from satellite operators' official websites and "Gunter's Space Page".





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