Galaxy 25

Galaxy 25 (G-25) launched in 1997, the launch was contracted by International Launch Services (ILS), (formerly known as Intelsat Americas 5 (IA-5) until 15 February 2007 when it was renamed as result of the merger between owner Intelsat and PanAmSat or Telstar 5) is a medium-powered communications satellite formerly in a geostationary orbit at 97° West, above a point in the Pacific Ocean several hundred miles west of the Galapagos Islands. It was manufactured by Space Systems/Loral, part of its LS-1300 satellite bus, and is currently owned and operated by Intelsat. The satellite's main C-band transponder cluster covers the United States, Canada, and Mexico; its main Ku-band transponder cluster covers the United States, Mexico, and the Northern Caribbean Sea. An additional C-band and a Ku-band transponder pair targets Hawaii.

Galaxy 25
NamesG-25
Intelsat Americas 5
IA-5
Telstar 5
Mission typeCommunications
OperatorLoral Skynet (1997-2007)
Intelsat (2007-)
COSPAR ID1997-026A
SATCAT no.24812
Websitehttps://www.intelsat.com
Mission duration12 years (planned)
Spacecraft properties
BusLS-1300
ManufacturerSpace Systems/Loral
Launch mass3,515 kg (7,749 lb)
Dry mass1,469 kg (3,239 lb)
Start of mission
Launch date24 May 1997, 17:00:00 UTC
RocketProton-K / DM-04
Launch siteBaikonur, Site 81/23
ContractorKhrunichev State Research and Production Space Center
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
Longitude97° West
Transponders
Band52 transponders:
24 C-band
28 Ku-band
Bandwidth36 MHz, 54 MHz, 27 MHz
Coverage areaHawaii, Canada, United States, Mexico, Caribbean
 

Galaxy 25 has a projected life of 12 years. It was replaced by Galaxy 19 (formerly IA-9) in late 2008.[1] When it was last in service at 97.1° West, Galaxy 25 transmitted both Free-to-air (FTA) direct-to-home (DTH) broadcasting and encrypted subscription channels / services. The replacement satellite, Galaxy 19 was successfully launched on September 24, 2008.[2] Galaxy 25 has been moved to a different orbital position at 93.1° West where it is currently broadcasting several services on its Ku band transponders.

Technical details
Key Parameters
Total TranspondersC-Band:24x36 MHz
Ku-Band:4x54 MHz, 24x27 MHz
PolarizationC-Band:Linear - Horizontal or Vertical
Ku-Band:Linear - Horizontal or Vertical
e.i.r.p. (C-Band)
e.i.r.p. (Ku-Band)
  • CONUS: 48.3 dBW
  • Alaska: 40.9 dBW
  • Caribbean: 43.4 dBW
  • Hawaii: 46.4 dBW
  • Mexico: 43.6 dBW
  • Puerto Rico / United States Virgin Islands: 44.9 dBW
  • Southern Canada: 44.3 dBW
Uplink FrequencyC-Band:5925 to 6425 MHz
Ku-Band:14.00 to 14.50 GHz
Downlink FrequencyC-Band3700 to 4200 MHz
Ku-Band:11.7 to 12.2 GHz
G/T (C-Band)
  • CONUS: -0.7 dB/K
  • Alaska: -8.2 dB/K
  • Caribbean: -4.7 dB/K
  • Hawaii: -5.2 dB/K
  • Mexico: -5.4 dB/K
  • Puerto Rico / United States Virgin Islands: -4.6 dB/K
  • Southern Canada: -2.3 dB/K
G/T (Ku-Band)
  • CONUS: +0.7 dB/K
  • Alaska: -3.3 dB/K
  • Caribbean: -3.2 dB/K
  • Hawaii: +0.6 dB/K
  • Mexico: -4.2 dB/K
  • Puerto Rico / United States Virgin Islands: +0.7 dB/K
  • Southern Canada: -1.6 dB/K
SFD Range (Beam Edge)C-Band:-92.0 to -71.0 dBW/m2
Ku-Band:-96.0 to -75.0 dBW/m2

Platform operators

The Ku-Band side of the satellite carried the platforms of Pittsburgh International Telecommunications, Inc (PIT), Globecast, RRSat, and ABS-CBN, with free-to-air and encrypted television and radio programming in a variety of languages:

See also

References
  1. "Intelsat Satellite Launch Schedule". Archived from the original on 17 May 2008. Retrieved 17 May 2008. Intelsat launch information
  2. "Sea Launch deploys new Galaxy for North America". Spaceflight Now. 24 September 2008. Retrieved 5 December 2022.
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