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Inmarsat 3-F5

NSSDCA/COSPAR ID: 1998-006B

Description

Inmarsat 3-F5 was the fifth in a series of five third generation satellites. Launched from the Kourou Space Center aboard an Ariane rocket, it is currently service over the Atlantic Ocean. It used the latest spot-beam technology and higher power to supply voice and data communications services worldwide to mobile terminals as small as pocket-size messaging units on ships, aircraft and vehicles.

INMARSAT-3 development was carried out by prime contractor Lockheed Martin and payload provider Matra Marconi Space. With an end-of-life power rating of 2,800 W, each INMARSAT-3 could deliver an IERP of up to 48dBW - eight times the INMARSAT-2 level - in L-band. It could dynamically reallocate both RF power and bandwidth among a global beam and five spot beams, allowing greater reuse of the available spectrums. Simultaneous voice channel capacity was up to eight times the INMARSAT-2 figure.

Each INMARSAT-3 also carried a navigation transponder designed to enhance the accuracy, availability and integrity of the GPS and Glonass satellite navigation systems.

Alternate Names

  • 25153
  • Inmarsat3-F5
  • 1998-006B

Facts in Brief

Launch Date: 1998-02-04
Launch Vehicle: Ariane 4
Launch Site: Kourou, French Guiana

Funding Agency

  • International Telecommunications Satellite Corporation International

Discipline

  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

 

Personnel

NameRoleOriginal AffiliationE-mail
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