Payload

Key features of the Inmarsat payload:

  • Payload integrated processors providing payload flexibility through coverage and power reconfiguration capabilities
  • 11 m diameter deployable reflector

The Alphasat mission definition is based on two main service types:

  • BGAN directional (as currently provided by Inmarsat-4)
  • BGAN Omni-directional (including handheld services)

Alphasat will be capable of accessing the additional 2x7 MHz in the L-band spectrum allocated at WRC-03, which was not available to the Inmarsat-4 satellites when originally specified. It will be positioned at 25°E, covering Europe, Middle East, Africa and parts of Asia.

Alphasat will be used by Inmarsat to expand its existing fleet. Following the implementation of the Inmarsat-4 satellite series, Inmarsat is currently deploying the new Broadband Global Area Network (BGAN) family of services to provide a wide range of high data rate applications to mobile user terminals for aeronautical, land and maritime markets.

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