Intelsat 5

Part of the Intelsat program

The last five of the nine spacecraft in this block carry a maritime mobile payload (seven additional transponders) for lease by Inmarsat.

Spacecraft
3-axis stabilized to 0.5 deg using momentum wheels. Hydrazine propulsion system. Passive thermal control. Dual solar arrays provide 1800 W BOL, NiCd or NiH batteries.

Payload
21 C-Band and 4 Ku-Band transponders. 12000 voice circuits and 2 TV channels.

Country of Origin	International
Customer/User	ITSO, Inmarsat
Manufacturer(s)	Ford Aerospace
Size	1.7 m x 1.8 m x 2.0 m core structure, 15.9 m solar array span
Orbit	F1: GEO over Atlantic then moved over Pacific / F2 : GEO over Atlantic / F3: GEO over Atlantic then moved over Pacific / F4: GEO over Indian Ocean / F5: GEO over Indian Ocean / F6: GEO over Atlantic / F7: GEO over Indian Ocean / F8: GEO over Indian Ocean / F9: 278 x 1111 km, incl. = 29.1 deg
Design Life	7 years

Launch Facts

Name	Int'l Desig.	Date	Site	Vehicle	Orbit	Mass(kg)
Notes
Intelsat 5 F-2	1980-098A	12/6/80	ESMC	Atlas Centaur	GEO	2000
Intelsat 5 F-1	1981-050A	5/23/81	ESMC	Atlas Centaur	GEO	1928
Intelsat 5 F-3	1981-119A	12/15/81	ESMC	Atlas Centaur	GEO	1870
Intelsat 5 F-4	1982-017A	3/5/82	ESMC	Atlas Centaur	GEO	1928
Intelsat 5 F-5	1982-097A	9/28/82	ESMC	Atlas Centaur	GEO	2000
Intelsat 5 F-6	1983-047A	5/19/83	ESMC	Atlas Centaur	GEO	1928
Intelsat 5 F-7	1983-105A	10/19/83	Kourou	Ariane 1	GEO	1928
Intelsat 5 F-8	1984-023A	3/5/84	Kourou	Ariane 1	GEO	1928
Intelsat 5 F-9	1984-057A	6/9/84	ESMC	Atlas Centaur	LEO	1091
Failure of Centaur upper stage left stranded in useless orbit