Galaxy 25

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Galaxy 25
Mission type Communications
Operator Loral Skynet (1997-2003)
Intelsat (2003—)
COSPAR ID 1997-026A
SATCAT № 24812
Mission duration 12 years
Spacecraft properties
Bus LS-1300
Manufacturer Space Systems/Loral
Launch mass 3,600 kilograms (7,900 lb)
Start of mission
Launch date 24 May 1997, 17:00:00 (1997-05-24UTC17Z) UTC
Rocket Proton-M/DM4
Launch site Baikonur 81/23
Contractor International Launch Services
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude 97° west (1997-2008)
93° west (1997—)
Transponders
Band 24 C-band
28 Ku-band

Galaxy 25 (G-25) launched in 1997 (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 0°N 97°W / 0°N 97°W / 0; -97, 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 U.S., Mexico, and the northern Caribbean Sea. An additional C-band and a Ku band transponder pair targets the Hawaiian Islands.

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 degrees 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 0°00′N 93°06′W / 0°N 93.1°W / 0; -93.1 where it is currently broadcasting several services on its Ku band transponders.

Technical details[edit]

Key Parameters
Total Transponders C-Band: 24x36 MHz
Ku-Band: 4x54 MHz, 24x27 MHz
Polarization C-Band: Linear - Horizontal or Vertical
Ku-Band: Linear - Horizontal or Vertical
e.i.r.p. (C-Band)
  • CONUS: 38.8 dBW
  • Alaska: 33.7 dBW
  • Caribbean: 34.3 dBW
  • Hawaii: 33.8 dBW
  • Mexico: 33.8 dBW
  • Puerto Rico / U.S. Virgin Islands: 34.0 dBW
  • Southern Canada: 37.0 dBW
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 / U.S. Virgin Islands: 44.9 dBW
  • Southern Canada: 44.3 dBW
Uplink Frequency C-Band: 5925 to 6425 MHz
Ku-Band: 14.00 to 14.50 GHz
Downlink Frequency C-Band 3700 to 4200 MHz
Ku-Band: 11.7 to 12.2 GHz
G/T (C-Band)
  • CONUS: -0.7 dB/K[citation needed]
  • Alaska: -8.2 dB/K
  • Caribbean: -4.7 dB/K
  • Hawaii: -5.2 dB/K
  • Mexico: -5.4 dB/K
  • Puerto Rico / U.S. 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 / U.S. 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[citation needed]
Ku-Band: -96.0 to -75.0 dBW/m2

Platform operators[edit]

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[edit]

References[edit]

  1. ^ http://www.intelsat.com/network/satellite/scheduled-launch.asp Intelsat launch information
  2. ^ http://news.yahoo.com/s/ap/20080924/ap_on_re_us/rocket_launches Two Rockets Launched

External links[edit]