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(Top) 1 Technical details 2 Platform operators 3 See also 4 References 5 External links

Galaxy 25

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Galaxy 25
Spacecraft properties
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)


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	52transponders: 24C-band 28Ku-band
Bandwidth	36MHz, 54 MHz, 27 MHz
Coverage area	Hawaii, Canada, United States, Mexico, Caribbean

Intelsat constellation ← Telstar 402R Galaxy 26 →

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 Telstar5, 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 K_u band transponders.

Technical details[edit]

Key Parameters
Total Transponders	C-Band:	24x36 MHz
	K_u-Band:	4x54 MHz, 24x27 MHz
Polarization	C-Band:	Linear - Horizontal or Vertical
	K_u-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 / United States Virgin Islands: 34.0 dBW Southern Canada: 37.0 dBW
e.i.r.p. (K_u-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 Frequency	C-Band:	5925 to 6425 MHz
	K_u-Band:	14.00 to 14.50 GHz
Downlink Frequency	C-Band	3700 to 4200 MHz
	K_u-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 / United States Virgin Islands: -4.6 dB/K Southern Canada: -2.3 dB/K
G/T (K_u-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^{[citation needed]}
	K_u-Band:	-96.0 to -75.0 dBW/m2

Platform operators[edit]

The K_u-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.

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.

External links[edit]

v t e Intelsat Corporation
COMSAT Intelsat Americas PanAmSat ITSO STS-49 List of Intelsat satellites
Intelsat I, II, III	Intelsat I Intelsat II F-1 II F-2 II F-3 II F-4 Intelsat III F-1 III F-2 III F-3 III F-4 III F-5 III F-6 III F-7 III F-8
Intelsat IV	Intelsat IV F-1 IV F-2 IV F-3 IV F-4 IV F-5 IV F-6 IV F-7 IV F-8 IVA F-1 IVA F-2 IVA F-3 IVA F-4 IVA F-5 IVA F-6
Intelsat V	Intelsat V F-1 V F-2 V F-3 V F-4 V F-5 V F-6 V F-7 V F-8 V F-9† VA F-10 VA F-11 VA F-12 VA F-13 VA F-14 VA F-15
Intelsat VI	Intelsat 601 602 603 604 605
Intelsat 7-10	Intelsat 701 702 703 704 705 706 707 708 709 801 802 803 804 805 806 901 902 903 904 905 906 907 10-02
ex-PanAmSat	Intelsat 1R 2 3R 4 5 6B 7 8 9 10 11 12
Recent Intelsat	Intelsat 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 (New Dawn) 29e 30 31 32e 33e 34 35e 36 37e 38 39 40e
Galaxy (Intelsat Americas)	Galaxy 3C 4R 5 9 10R 11 12 13 14 15 16 17 18 19 23 25 26 27 28 30 31 32 33 34 35 36 37
Other	APR-1 APR-2 Horizons-1 Horizons-2 Horizons-3e Intelsat K Marisat-F2 SBS 6

← 1996

Orbital launches in 1997

1998 →

Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

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