Sirius 3

Sweden

Spacecraft n°:

Swedish spacecraft n°: 6

Launch data:

Designation25492 / 98056B
Launch date05 Oct 1998
Launch site Ko, ELA-2
Launch vehicle  Ariane-44L (V111)
MissionCommercial: Communications
Geostationary orbit:
Perigee / Apogee 35776 x 35796 km
Eccentricity 2,37E-04
Inclination 0.06 deg
Period 1436.07 min

Replaced Sirius 1 in Jan 2000.

Specifications:

Prime contractorHughes
PlatformHS-376HP
OperatorSES Sirius AB
Mass at launch1465 kg
Mass in orbit 815 kg
Dry mass 630 kg
Dimension 2.16 m diameter, 7.76 m height deployed
Solar array gallium arsenide
Stabilization spin stabilized
DC powerEOL: 1400 W
Transponders15 BSS
Frequency band11.7 - 12.5 GHz
Transponder band33 MHz
Design lifetime12 years

Location:

BeginEndPosition
L: 5 Oct 1998Nov 199928°E (backup)
Dec 1999 5°E
July 2012 51.2°E


End of live:

End of Operation:  Dec 2011 ?
Cause:  

NSAB leased the satellite to Astra for 12 months right after launch

Ku-band:

Main transponders 15
Backup transponders 2 
Power 44 W
Bandwidth 33 MHz
Coverage Scandinavia
EIRP max 54 dBW
Polarization linear
Frequencies uplink: 17.3-18.1 GHz
downlink: 11.7-12.5 GHz

Transponder frequency chart (GHz)

Horizontal
downlink 		Transponder Vertical
downlink
  4  11.78502
11.80420 5   
  6  11.82338
11.84256 7   
  8  11.83174
11.88092 9   
  10 11.90010
11.91928 11  
  12 11.93846
11.95764 13  
  14 11.97682
11.99600 15  
  16 12.01518
12.03736 17  
  18 12.05354
Ref: #7(JR662), #226 - update: 06.08.12