Centralised Mode S Interrogator Code Allocation (MICA) specification

EUROCONTROL Specification for the Mode S IC Allocation Coordination and IC Conflict Management - PUBLISHED

This EUROCONTROL specification defines processes applicable to the use of the centralised Mode S interrogator code allocation service in charge of coordinating interrogator code allocations within the ICAO European region and ICAO Middle-East region.

This document specifies the detailed procedures for Mode S Operators to obtain a coordinated Mode S Interrogator Code (IC) and particularly the interfaces between the Mode S Operators, the Focal Points representing competent States in the ICAO European region, the single ICAO Middle-East Focal Point representing all competent States of ICAO Middle-East region and the EUROCONTROL centralised Mode S interrogator code allocation service.

This document also specifies the procedures in place to manage interrogator code conflicts and the resolution of issues with respect to the interrogator code allocation plan.

The EUROCONTROL Specification for the Mode S IC Allocation Coordination and IC Conflict Management supports the COMMISSION REGULATION (EC) No 262/2009 of 30 March 2009 laying down requirements for the coordinated allocation and use of Mode S interrogator codes for the single European sky. Section 8 of this specification provides the traceability to some provisions of that regulation.

 

Background

Whilst traditional Mode A/C Secondary Surveillance Radar stations continuously interrogate all aircraft within their range, Mode S Secondary Surveillance Radar stations establish addressed interrogations with aircraft within their coverage.

In order to avoid ambiguity in the operation of the system it is essential that each Mode S radar is allocated an Interrogator Code (IC) which, in a coordinated operational environment, protects its operation from interference with other Mode S radars operating in overlapping or contiguous airspace.

Due to the limited number of Interrogator Codes, it is necessary to have a centralised IC allocation system to ensure an optimised coordinated approach to the allocation and implementation of the ICs used by Mode S radars.

In the ICAO European region, the centralised IC allocation system is conducted by EUROCONTROL through the MICA Cell on behalf of the European regional office of ICAO.

EUROCONTROL is also supporting the Middle East regional office of ICAO in Mode S IC Allocation coordination of the ICAO Middle East Region. IC allocation requests for this region must be submitted through MID ICAO regional office.

The Commission of the European Union has adopted Regulation (EC) No 262/2009 of 30 March 2009 laying down requirements for the coordinated allocation and use of Mode S interrogator codes for the single European sky.

More information can be found on the MICA webpage.
 

Consultation

The EUROCONTROL Specification for the Mode S IC Allocation Coordination and IC Conflict Management was subject to a formal written consultation from 06 February 2013 to 15 March 2013 using the EUROCONTROL Notice of Proposed Rule-Making (ENPRM) mechanism.

Development

The Surveillance Ground Environment Group - Mode S Interrogator Codes Co-ordination Group (SGEG-MICoG) is the EUROCONTROL working arrangement in charge of overseeing the Mode S IC allocation process and of providing guidance to the MICA Cell including the maintenance of the specification. The SGEG-MICoG reports to EUROCONTROL’s Surveillance Steering Group and the CNS Team.

Edition History

EUROCONTROL Specification for the Mode S IC Allocation Coordination and IC Conflict Management EUROCONTROL-SPEC-0153 Edition 1.0 was published on 14 June 2013