Inmarsat-4 F3

INMARSAT / UK

Spacecraft nº:

INMARSAT spacecraft nº: 12

Launch data:

Designation	33278 / 08039A
Launch date	18 Aug 2008 - 22:43 UT
Launch site	B, LC-200/39
Launch vehicle	Proton-M / Briz-M
Mission	Commercial: Communications
Geostationary orbit:
Perigee / Apogee	35775 x 35798 km
Eccentricity	2,73E-04
Inclination	3.01 deg
Period	1436.1 min

Spacecraft data:

Prime contractor	Astrium/Toulouse
Operator	INMARSAT Ltd / London
Platform	Eurostar 3000
Mass at launch	5960 kg
Dry Mass	kg
Basic shape
Dimension (m)
Solar array	span of 45m
Antenna	large 10 m diameter L-band mobile comms
DC power	13000 W
Design lifetime	15 yrs - Still active

Location:

Date	Position	Remarks
Jan 2012	97.65° W

Description:

200 spot-beams to relay messages from mobile phones based on land, sea, or air.

Mission details:

The Inmarsat 4F3 maritime communications satellite was launched by a Khrunichev Proton on Aug 18.
The Inmarsat satellite was deployed in a 4310 x 35812 km x 22.8 deg orbit with the Briz-M stage after intermediate orbits of 172 x 173 km x 48 deg, 254 x 5000 km, and 408 x 35876 km x 46 deg. The Briz-M drop tank is in a 312 x 13603 km x 46.2 deg orbit; the Proton third stage fell back to Earth from a -919 x 164 km x 47.9 deg orbit.

Ref.: #7(JR599), #78a, #226 - update: 11.02.12