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Galaxy 4R



General


Designation 26298 / 00020A
Launch date 19 Apr 2000
Country of origin United States
Mission Telecommunications
Geostationary orbit see below
Launch vehicle Ariane V129_v129

The secondary XIPS propulsion system failed in Jun 2003. The primary was already dead. Therefore only 3 years lifetime remain with the traditional fuel. The satellite is insured for such failures.

Location


Begin End Position
L: 19 Apr 2000 Jun 2000 73°W
Jun 2000 Aug 2006 99°W
Sep 2006 Apr 2009 76.85°W, inclined


End of life


Out of service Apr 2009
Cause moved to the junk orbit


sat-index articles


Technical data


Lyngsat transponder loading


EIRP coverage (dBW)


C-band Horizontal
C-band Vertical
Ku-band Horizontal
Ku-band Vertical

G/T coverage (dB/K)


C-band Horizontal
C-band Vertical
Ku-band Horizontal
Ku-band Vertical

Specifications


Prime contractor Hughes
Platform HS-601HP
Mass at launch 3716 kg
Dry mass 1895 kg
Mass in orbit 2511 kg
Dimension stowed: 2.7 x 3.6 x 4 m
Solar array 26 m span, gallium arsenide
Stabilization 3-axis
DC power BOL: 8800 W
EOL: 7800 W
Design lifetime 15 years

Beacons: 4.198125 V and 4.199625 H GHz
ULPC: 12.195 V and 11.701 H GHz

C-band


Main transponders 24
Backup transponders
Power 40 W
Bandwidth 36 MHz
Coverage North America
EIRP max 41 dBW
G/T max -1 dB/K
Polarization linear H/V
SFD -94 dBW/m² (at 0 G/T & 0 dB attenuation)
Frequencies Uplink: 5.925 - 6.425 GHz
Downlink: 3.700 - 4.200 GHz

C-band transponder frequency chart

Ku-band


Main transponders 24
Backup transponders
Power 108 W
Bandwidth 36 MHz
Coverage North America
EIRP max 45 dBW
G/T max 0 dB/K
Polarization linear H/V
SFD -94 dBW/m² (at 0 G/T & 0 dB attenuation)
Frequencies Uplink: 14.000 - 14.500 GHz
Downlink: 11.700 - 12.200 GHz


Ku-band transponder frequency chart (GHz)


Horizontal
Uplink
Horizontal
Downlink
Transponder Vertical
Downlink
Vertical
Uplink
  11.720   14.020
14.040   11.740  
  11.760   14.060
14.080   11.780  
  11.800   14.100
14.120   11.820  
  11.840   14.140
14.160   11.860  
  11.880   14.180
14.200   10 11.900  
  11.920 11   14.220
14.240   12 11.940  
  11.960 13   14.260
14.280   14 11.980  
  12.000 15   14.300
14.320   16 12.020  
  12.040 17   14.340
14.360   18 12.060  
  12.080 19   14.380
14.400   20 12.100  
  12.120 21   14.420
14.440   22 12.140  
  12.160 23   14.460
14.480   24 12.180  


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