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Inmarsat 3F5


Designation 25153 / 98006B
Launch date 4 Feb 1998
Country of origin International
Mission Telecommunications
Geostationary orbit 24.5°E
Launch vehicle Ariane V105

In late-2021 it is announced that the satellite (a single transponder) is used by the UK (project UKSBAS) to transmit a GPS signal generated and uplinked at Goonhilly.


Begin End Position
L: Feb 1998 Dec 2015 24.5°E
Feb 2016   54°W

External resources

sat-index articles

Technical data


Has onboard the first payload of the GNSS 1 system, to enhance the GPS navigation system.

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