Galaxy 25
Names | G-25 Intelsat Americas 5 IA-5 Telstar 5 |
---|---|
Mission type | Communications |
Operator | Loral Skynet (1997-2007) Intelsat (2007-) |
COSPAR ID | 1997-026A |
SATCAT no. | 24812 |
Website | https://www.intelsat.com |
Mission duration | 12 years (planned) |
Spacecraft properties | |
Bus | LS-1300 |
Manufacturer | Space Systems/Loral |
Launch mass | 3,515 kg (7,749 lb) |
Dry mass | 1,469 kg (3,239 lb) |
Start of mission | |
Launch date | 24 May 1997, 17:00:00 UTC |
Rocket | Proton-K / DM-04 |
Launch site | Baikonur, Site 81/23 |
Contractor | Khrunichev State Research and Production Space Center |
Orbital parameters | |
Reference system | Geocentric orbit |
Regime | Geostationary orbit |
Longitude | 97° West |
Transponders | |
Band | 52 transponders: 24 C-band 28 Ku-band |
Bandwidth | 36 MHz, 54 MHz, 27 MHz |
Coverage area | Hawaii, Canada, United States, Mexico, Caribbean |
Galaxy 25 (G-25) launched in 1997, 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 for 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 using 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 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
[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) |
| |
e.i.r.p. (Ku-Band) |
| |
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) |
| |
G/T (Ku-Band) |
| |
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]- ^ "Intelsat Satellite Launch Schedule". Archived from the original on 17 May 2008. Retrieved 17 May 2008. Intelsat launch information
- ^ "Sea Launch deploys new Galaxy for North America". Spaceflight Now. 24 September 2008. Retrieved 5 December 2022.