Telstar 5 --> Intelsat Americas 5 (IA 5)
--> Galaxy 25

Loral Skynet (US) --> Intelsat

Spacecraft n:

INTELSAT spacecraft n:

Renamed: Galaxy-25 - Also called: Intelsat IA-5

Launch data:

Designation 24812 / 97026A
Launch date 24 May 1997
Launch site Baikonur, LC-81/23
Launch vehicleProton-K/DM4 (#247)
MissionCommercial: Communications
Geostationary orbit:
Perigee / Apogee 35771 x 35801 km
Eccentricity 3,56E-04
Inclination 0.03 deg
Period 1436.08 min


Specifications

Prime contractorSpace Systems/Loral
PlatformFS-1300
OperatorLoral Skynet --> Intelsat, Ltd.
Mass at launch3515 kg
Mass in orbit 2421 kg
Dry mass 1469 kg
Dimension 5.45 x 3.14 x 2.96 m (31.09 m deployed)
Solar array2 deployable solar arrays, 59.64 m²
Stabilization3 axis
PropulsionR-4D-11
DC power EOL: 8100 W
Equipment24 C-band, 28 Ku-band transponders
Design lifetime 13 yrs - still active

Location:

DatePositionRemarks
  97°W 
 July 2010  93.09° W 

Entered service in early July 1997


C-band:

Main transponders 24
Backup transponders
Power 20 W
Bandwidth 36 MHz
Coverage US (50 states) + Caribbean
EIRP max CONUS: 36.9 dBW
Alaska: 33.3 dBW
Hawaii: 32.2 dBW
Puerto Rico/US Virgin Islands: 32.7 dBW
G/T max CONUS: -0.7 dB/K
Alaska: -8.9 dB/K
Hawaii: -6.3 dB/K
Puerto Rico/US Virgin Islands: -4.6 dB/K
Polarization linear H/V

C-band Transponder frequency chart
Beacons: 4.1955 & 4.1999 GHz

Ku-band:

Main transponders 28
Backup transponders
Power 100 W
Bandwidth 24 transponders of 27 MHz
4 transponders of 54 MHz
Coverage US (50 states) + Caribbean, Mexico and Southern Canada
EIRP max CONUS: 47.5 dBW
Alaska: 40.9 dBW
Hawaii: 45.4 dBW
Puerto Rico/US Virgin Islands: 43.6 dBW
Mexico: 42.3 dBW
Southern Canada: 42.2 dBW
G/T max CONUS: +0.7 dB/K
Alaska: -3.3 dB/K
Hawaii: -0.1 dB/K
Puerto Rico/US Virgin Islands: +0.2 dB/K
Mexico: -4.2 dB/K
Southern Canada: -1.6 dB/K
Polarization linear H/V

Beacon: 11.702 & 12.198 GHz
Ku-band: No variable power nor cross-strapping like on the 40x series

Ku-band Transponder frequency chart (GHz):

Horizontal
Uplink
Horizontal
Downlink
Transponder Vertical
Downlink
Vertical
Uplink
Bandwidth
14.0285   11.7285   54 MHz
  11.7350   14.0350 54 MHz
14.0895   11.7895   54 MHz
  11.7960   14.0960 54 MHz
14.1360   11.8360   27 MHz
  11.8425   14.1425 27 MHz
14.1670   11.8670   27 MHz
  11.8735   14.1735 27 MHz
14.1980   11.8980   27 MHz
  11.9045 10   14.2045 27 MHz
14.2290   11 11.9290   27 MHz
  11.9355 12   14.2355 27 MHz
14.2600   13 11.9600   27 MHz
  11.9665 14   14.2665 27 MHz
14.2910   15 11.9910   27 MHz
  11.9975 16   14.2975 27 MHz
14.3220   17 12.0220   27 MHz
  12.0285 18   13.3285 27 MHz
14.3530   19 12.0530   27 MHz
  12.0595 20   14.3595 27 MHz
14.3840   21 12.0840   27 MHz
  12.0905 22   14.3905 27 MHz
14.4150   23 12.1150   27 MHz
  12.1215 24   14.4215 27 MHz
14.4460   25 12.1460   27 MHz
  12.1525 26   14.4525 27 MHz
14.4770   27 12.1770   27 MHz
  12.1835 28   14.4835 27 MHz


Description:

Mission details:


Ref: #14, #15, #226 - update: 03.11.10