Inmarsat 2's specifications

Prime contractor	British Aerospace (now MMS)
Platform	Eurostar-1000
Mass at launch	1310 kg with Ariane 1385 kg with Delta
Mass in orbit	BOL: 824 kg
Payload mass	132 kg
Dimension	1.6 x 1.5 x 2.6 m
Solar array	15.23 m span
Stabilization	3-axis
DC power	EOL: equinox: 1156 W, solstice: 1040 W
Payload power	660 W
Design lifetime	10 years
Capacity	250 duplex voice channels

The Inmarsat system has downlinks in L-band that are uplinked in C-band (6 GHz) and uplinks in L-band are downlinked in C-band (4 GHz).

The Inmarsat M standard defines the use on a 10 kg case which cover is the antenna. The uplink frequencies are 1.626-1.660 GHz and 1.525-1.559 GHz for download. Data can be transmitted at 2400 bauds.

---