Aircraft Earth Stations (AES)

Aircraft Earth Stations (AES) are mobile earth stations in the Aeronautical Mobile-Satellite Service located on board aircraft and operate in the secondary MSS frequency allocations at 14 GHz. These stations are intended to provide non-safety related data communication services and will be authorized for the installation and operation by the national regulatory authority and/or civil aviation authority in the country where the aircraft are registered.
Operation of AES without individual authorisation from each of the CEPT administrations is essential for the provision of an uninterrupted service to users whilst aircraft crosses borders of various countries, as well as in reducing the regulatory burden.
The ECC has developed a process of AES authorisation which takes into account the requirements of both CEPT administrations and AES operators, and the international obligations defined in the ITU Radio Regulations.  This process is put into place through ECC Decision (05)11 "on the free circulation and use of AES".
According to this Decision administrations should make the national information on AES operation (terms of AES operation when the aircraft is on the ground, any additional limitations on the operation of AES at low altitudes and need for frequency authorisation) available to operators through the ECO information services. On the other hand, AES operators are also required to register their networks with the ECO and to provide through the ECO information servicees certain technical and operational data about their networks.
As required by this regulatory framework, the Office has arranged a password-protected access for NRAs (CEPT administrations) to the AES operators’ data in the ECC Documentation Database (corresponding ZIP files can be downloaded directly from the ECC Decision’s (05)11 area in the database).
In return for complying with the requirements of the said ECC Decision, AES are granted free circulation and use, and AES operators are exempted from the requirement to obtain additional authorisations from each of the overflown CEPT administrations which have implemented ECC Decision (05)11.
It is important to note that use of AES requires authorization by the relevant national Administration and/or Civil Aviation Authority of the country where the aircraft is registered.
Please note that ECC Decisions are implemented by CEPT administrations on a voluntary basis. The current implementation status of ECC Decision (05)11 can be consulted via its implementation record (link to the implementation record for ECC/DEC/(05)11). This record also contains references to country specific policy guidance on the use of AES for some CEPT countries which have not implemented the said Decision.
ECO contact for AES related enquiries and filing AES information in the ECO database: 
Thomas Weber,, tel. +45 33 89 63 12

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