Galaxy 25

Galaxy 25 (G-25) launched in 1997, the launch was contracted by International Launch Services, (formerly known as Intelsat Americas 5 (IA-5) until February 15, 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 97.0° 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 FS-1300 line, and is currently owned and operated by Intelsat. The satellite's main C-band transponder cluster covers the United States, Southern 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 the Hawaii.

Galaxy 25
Mission typeCommunications
OperatorLoral Skynet (1997-2007)
Intelsat (2007-)
COSPAR ID1997-026A
SATCAT no.24812
Mission duration12 years (planned)
Spacecraft properties
BusLS-1300
ManufacturerSpace Systems/Loral
Launch mass3600 kg
Start of mission
Launch date24 May 1997, 17:00:00 UTC
RocketProton-K / DM4
Launch siteBaikonur, 81/23
ContractorKhrunichev
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
Longitude97° West (1997-2008)
93.1° West (2008-)
Transponders
Band24 C-band
28 Ku-band
Bandwidth36 MHz, 54 MHz, and 27 MHz
Coverage areaUnited States, Southern Canada, Caribbean, and Mexico
 

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
  • FTA Receiver

References
  1. "Archived copy". Archived from the original on 2008-05-17. Retrieved 2008-05-17.CS1 maint: archived copy as title (link) Intelsat launch information
  2. https://news.yahoo.com/s/ap/20080924/ap_on_re_us/rocket_launches Two Rockets Launched
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