Inmarsat 4's L-band (1.6/1.5 GHz)

Main transponders 120
Backup transponders 30
Bandwidth 200 kHz
Coverage & EIRP max Global
19 wide beams
over 200 spot beams (67 dBW)
Other 9 x 12 m antenna
Usage Forward C-band to L-band with return L-band to C-band
Direct L-band to L-band user routing on-board

Additional power can be flexibly allocated to some spots.

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