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Galaxy 3R


Renamed Anik E2R

General


Designation 23741 / 95069A
Launch date 15 Dec 1995
Country of origin United States
Mission Telecommunications
Geostationary orbit see below
Launch vehicle Atlas 2A #97
Mass at launch 3380 kg

Cost: $150 million

Using a combination of digital compression and tightly focused spot beams, Galaxy 3R used 24 Ku-band transponders to deliver as many as 144 channels of digital video and 60 channels of CD- quality audio via 24-inch (60 cm) dishes. The service was called Galaxy Latin America. In early 1998 the service was moved to Galaxy 8i.

A beam of the satellite was then moved to the US in order to extend the DirecTV programming.

On 23 April 2001, the satellite lost its primary SCP. It is now running on the backup one.

On 15 Jan 2006, the satellite experienced an anomaly on its secondary SCP.

Location


Begin End Position
L: 15 Dec 1995 Sep 2002 95°W
Nov 2002 Apr 2003 74°W
May 2003 Jan 2005 111.1°W
Feb 2005 Feb 2006 73.95°W, inclined


End of life


Out of service 15 Jan 2006
Cause second SCP failed


External resources


sat-index articles


Technical data


Specifications
C-band transponder frequency chart
Ku-band transponder frequency chart

EIRP coverage (dBW)


C-band Horizontal
C-band Vertical
Ku-band conus + offshore
Ku-band conus Horizontal
Ku-band conus Vertical

G/T coverage (dB/K)


C-band Horizontal
C-band Vertical
Ku-band conus + offshore
Ku-band conus


C-band


Main transponders 24
Backup transponders 6
Power 16 W (SSPA)
Bandwidth 36 MHz
Coverage & EIRP max CONUS: 40 dBW
Alaska, Hawaii: 33 dBW
G/T max +2 dB/K (conus)
SFD -77 to -91 dBW/m²
Polarization linear H/V
Frequencies uplink: 5.925-6.425 GHz
downlink: 3.700-4.200 GHz

Strap-crossing: transponders 18 and 24 can be feed by the Ku-band transponders 17 and 23 respectively.
TT&C: 5.935 H and 6.415 B GHz
Telemetry: 4.1985 & 4.199625 GHz

Ku-band


Main transponders 24
Backup transponders 6
Power 63 W (TWTA)
Bandwidth 16 transponders of 27 MHz (horizontal)
8 transponders of 54 MHz (vertical)
Coverage 2 beams (12 transponders each): North America
EIRP max 47 dBW
G/T max +3 dB/K (conus)
SFD -77 to -94 dBW/m²
Polarization linear H/V
Frequencies Uplink: 14.0 - 14.500 GHz
Downlink: 11.7-12.2 GHz

Downlink frequencies where switched from 11.450 - 11.750 GHz circular (with coverage to Latin America and Brazil on 2 beams) to 11.7-12.2 GHz linear (coverage to North America) sometime in Apr 1998 after Galaxy 8i went operational. It is unclear if the uplink frequencies also changed.

Strap-crossing: transponders 17 and 23 can be feed by the C-band transponders 18 and 24 respectively

Ku-band transponder frequency chart (GHz)


Horizontal
Uplink
Horizontal
Downlink
Transponder Vertical
Downlink
Vertical
Uplink
Uplink beam Downlink beam
  11.720 1   14.020 Conus Conus
14.050   2 11.750   Conus + Offshore Conus
  11.750 3   14.050 Conus Conus
  11.780 4   14.080 Conus Conus
14.110   5 11.810   Conus + Offshore Conus or Conus + Offshore
  11.810 6   14.110 Conus Conus
  11.840 7   14.140 Conus Conus
14.170   8 11.870   Conus + Offshore Conus or Conus + Offshore
  11.870 9   14.170 Conus Conus
  11.900 10   14.200 Conus Conus
14.230   11 11.930   Conus + Offshore Conus or Conus + Offshore
  11.930 12   14.230 Conus Conus
  11.960 13   14.260 Conus Conus
14.290   14 11.990   Conus + Offshore Conus or Conus + Offshore
  11.990 15   14.290 Conus Conus
  12.020 16   14.320 Conus Conus
14.350   17 12.050   Conus + Offshore or C-band Conus or Conus + Offshore
  12.050 18   14.350 Conus Conus
  12.080 19   14.380 Conus Conus
14.410   20 12.110   Conus + Offshore Conus or Conus + Offshore
  12.110 21   14.410 Conus Conus
  12.140 22   14.440 Conus Conus
14.470   23 12.170   Conus + Offshore or C-band Conus or Conus + Offshore
  12.170 24   14.470 Conus Conus


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