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astronautix.com ECS/OTS

ECS-OTS
ECS-OTS -

Credit: ESA. 11,358 bytes. 338 x 212 pixels.



Class: Communications. Nation: Europe. Agency: ESA.

3-axis controlled, maintained by 2 x 25 Nms and 1 x 16 Nms momentum wheels, and 20 x 0.7 N / 8 N thrusters with 118 kg propellant. 1260 W generated by solar panels, feeding two 24 Ahr NiCd batteries. On the Marecs series the spacecraft provided three repeaters: shore-to-ship with 5 MHz bandwidth, ship-to-shore with 6 MHz bandwidth, shore-to-shore with 0.5 MHz bandwidth. These provide 35 two-way voice channels plus search and rescue capabilities.


Specification

Total Mass: 1,490 kg.


ECS/OTS Chronology


20 December 1981 MARECS 1 Program: MARECS. Launch Site: Kourou . Launch Vehicle: Ariane 1. Mass: 582 kg. Perigee: 35,772 km. Apogee: 35,801 km. Inclination: 6.3 deg.

MARECS-A was a geostationary maritime communications satellite, which formed part of INMARSAT's world-wide maritime communications satellite network. MARECS-A moved to a new position on the geostationary orbit. Old position: 334E. New position: 22.5 E. The Marecs satellites were members of Inmarsat's first generation global maritime communications network. Additional Details: MARECS 1.


09 September 1982 MARECS B Program: MARECS. Launch Site: Kourou . Launch Vehicle: Ariane 1. FAILURE: Failure.

Marecs B intended for maritime communications, planned for lease to Inmarsat; launched with Sirio 2. Geosynch orbit.


16 June 1983 Eutelsat 1 Program: Eutelsat. Launch Site: Kourou . Launch Vehicle: Ariane 1. Mass: 1,050 kg. Perigee: 35,748 km. Apogee: 35,773 km. Inclination: 3.8 deg.

Designator ESA/83/4. Launch time 1159 GMT. Launch agency ESA. Geostationary position 10+/- 0.1 deg E. EUTELSAT 1 is a regional geostationary telecommunication Satellite for European countries. It is operated by the EUTELSAT organization. Frequency plan: 1 36-138 MHz (S-E). 148-149.9 MHz (E-S). 10.7-11.7 GHz (S-E). 14-14.5 GHz (E-S). Positions: Document


04 August 1984 Telecom 1A Program: Telecom. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. Mass: 690 kg. Perigee: 36,176 km. Apogee: 36,462 km. Inclination: 2.9 deg.

Stationed at 8 deg W. Communications satellite. Registration France 1984-2.B (Telecom 1A) 1985-2.B (Telecom 1B). 1988-1-C (Telecom 1C).


10 November 1984 MARECS 2 Program: MARECS. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. Mass: 563 kg. Perigee: 35,772 km. Apogee: 35,803 km. Inclination: 4.2 deg.

Stationed at 177.5 deg E; maritime communications; leased by Inmarsat. Geostationary position 177.5 deg E. MARECS PAC 1 is a geostationary maritime mobile communication satellite which will form part of the INMARSAT world-wide maritime communication satellite network. 1985 Jul 1. Move to a new position. Old position: 177.5E. New position: 345 deg E.


08 May 1985 Telecom 1B Program: Telecom. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. Mass: 690 kg. Perigee: 35,764 km. Apogee: 35,784 km. Inclination: 5.4 deg.

Stationed at 5 deg W; business communications. Communications satellite. Registration France 1984-2.B (Telecom 1A) 1985-2.B (Telecom 1B). 1988-1-C (Telecom 1C).


12 September 1985 Eutelsat 3 Program: Eutelsat. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. FAILURE: Geosynchronous orbit injection failure. Third stage igniter cartridge failure was determined to be the most likely cause.

Launched with Spacenet F3.


16 September 1987 Eutelsat I F4 Program: Eutelsat. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. Mass: 1,175 kg. Perigee: 35,759 km. Apogee: 35,812 km. Inclination: 0.4 deg.

European communications; 10 deg E.


21 July 1988 Eutelsat I F5 Program: Eutelsat. Launch Site: Kourou . Launch Vehicle: Ariane 2/3. Mass: 1,185 kg. Perigee: 35,779 km. Apogee: 35,793 km. Inclination: 0.0 deg.

European communications; 13 deg E. ECS-5/Eutelsat I F5 is a regional geostationary telecommunications satellite for European countries. It is operated by the EUTELSAT organization. Frequency plan 136-138 MHz (S-E), 148-149.9 MHz (E-S), 10.7-11.7 GHz (S-E), 14.0-14.5 GHz (E-S). Launch time 2334:00 UT. ESA designator ESA/88/03.


11 December 1988 Skynet 4B Program: Skynet. Launch Site: Kourou . Launch Vehicle: Ariane 44LP. Mass: 1,433 kg. Perigee: 35,756 km. Apogee: 35,792 km. Inclination: 1.3 deg.

British military communications; 1 deg W. Military communications.


01 January 1990 Skynet 4A Program: Skynet. Launch Site: Cape Canaveral . Launch Vehicle: Titan 34D. Mass: 1,463 kg. Perigee: 35,773 km. Apogee: 35,802 km. Inclination: 1.8 deg.

British military communications; 6 deg E. Military communications. Expected life approx 7 years. Owner/operator: Ministry of Defence, Main Building, Whitehall, London SW1A 2HB.


08 January 1991 NATO 4A Program: NATO. Launch Site: Cape Canaveral . Launch Vehicle: Delta 7925. Mass: 1,433 kg. Perigee: 35,775 km. Apogee: 35,800 km. Inclination: 2.6 deg.

NATO communications; 18 deg W. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


08 December 1993 USA 98 Program: NATO. Launch Site: Cape Canaveral . Launch Vehicle: Delta 7925. Mass: 1,430 kg. Perigee: 762 km. Apogee: 35,914 km. Inclination: 23.3 deg.

NATO encrypted communications relay. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


10 January 1998 Skynet 4D Program: Skynet. Launch Site: Cape Canaveral . Launch Vehicle: Delta 7925 . Perigee: 35,776 km. Apogee: 35,795 km. Inclination: 3.9 deg.

Geostationary at 52.8 degrees E.


26 February 1999 Skynet 4E Program: Skynet. Launch Site: Kourou . Launch Vehicle: Ariane 44L. Mass: 1,490 kg. Perigee: 35,774 km. Apogee: 35,799 km. Inclination: 3.3 deg.

Skynet 4E was a SHF/UHF military communications satellite for the UK Ministry of Defense. Dry mass was 759 kg; it used a Thiokol Star 30 solid apogee motor. Stationed at 53 deg E.



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Last update 12 March 2001.
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