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 Mode S and ACAS Programme
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EUROCONTROL > ATM Performance > EATM > MSA 

Mode S Interrogator Code (IC) Allocation Cell
 
The operation of Mode S Secondary Surveillance Radars requires the allocation of Interrogator Codes (ICs).

In order to support the deployment of an increasing number of Mode S interrogators and to avoid a shortage of codes available for the interrogation of aircraft, there is a need to co-ordinate the allocation and use of Mode S ICs. The procedure for this purpose exists already in Europe and is currently applied under the responsibility of ICAO that delegated its practical implementation to EUROCONTROL.

EUROCONTROL's Mode S IC Allocation cell operates from within the Surveillance Domain.
  For further information click here
The Commission of the European Communities has adopted Regulation (EC) No 262/2009 of 30 March 2009, which lays down requirements for the coordinated allocation and use of Mode S interrogator codes for the single European sky.
  For further information click here

Useful Documents


Principles of Mode S Operation & Interrogator Codes

This document contains a description of the principles of Mode S operation, including selective addressing, Interrogator Codes (II-Codes and SI-Codes), modes of operation and general issues related to Mode S operation. It is intended to provide some explanations for those implementing Mode S.
Acrobat EN
Date: 18/03/2003 Edition: 2.3

Mode S IC Allocation Process

This document describes the process National Regulatory Authorities and EUROCONTROL’s Mode S Interrogator Codes (IC) Allocation Cell (MICA Cell) shall follow, to co-ordinate the allocation of Mode S Interrogator Codes in the European Region.
Acrobat EN
Date: 29/09/2005 Edition: 1.0
 
  Last validation: 15/12/2009