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.
| 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 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
editThe 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
editReferences
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.