Mode S Interrogator Code Allocation Status

Supporting European

Aviation

MICA Workshop for ICAO MID StatesAgenda Item #6

Jérôme BODART

EUROCONTROL MICA Cell

19-20 October 2021

Mode S Interrogator Code Allocation StatusCycle 35

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Current Cycle – Mode S IC Allocation Cycle 35

Key dates of the MICA Cycle 35:

• Start of MICA Cycle 35 (Requirements Freeze Date) : 20 May 2021

• Draft Proposals Issue Date (start date of Review Period) : 17 June 2021

• State Agreement : required by 15 July 2021 (expected end date of Review Period)

• IC allocations issued on 29 July 2021

• Implementation Period: 12 August 2021 – 03 November 2021

Mode S Code Allocation – Cycle 35Interrogator Status 2

Requirements Freeze Date

IC Allocations Proposals

State Agreement

Publication of IC Allocation plan

Implementation Period84 days

Simulation Period28 days

Review Period28 days

Contingency14 days

Publication Period

14 days

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IC Allocations issued for new Mode S radar

• 734 ATC/AD Mode S radar being allocated an operational IC• 611 ATC/AD allocated in ICAO European region• 123 ATC/AD allocated in ICAO Middle East region

• Ad-Hoc 3 new ATC/AD Mode S radar:• March 2021 UAE (1) : UAE Air Force and Air Defence E9-027• April 2021 Poland (1) : Polish AF NUR-12ME Radoszki• June 2021 Russia (1) : State ATM Corporation RS Jigansk

• MICA Cycle 35 16 new ATC/AD Mode S radar:• Azerbaijan (1) : AZANS Fuzuli• Belgium (1) : skeyes Saint-Hubert Mode S• Bulgaria (1) : BULATSA Varna TAR• France (1) : French MoD MBA 3D Villacoublay• Egypt (9) : NANSC Abu Simbel, Cairo approach, El Dakhla, El Kharga, Farafra, Marsa Martrouh 2,

Sharq El Oweinat, Sidi Barani, Siwa• Montenegro (1) : SMATSA ME Vrsuta• Slovakia (1) : Slovak Air Force MIL-SRE-LZMC • Spain (1) : ENAIRE El Judio (LEJD)

Mode S Interrogator Code Allocation Status – Cycle 35 3

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Modification of IC Allocations

• IC allocations modified by MICA Cycle 35:• Croatia (1) : Croatia Control Konavle (radar coverage reduction on SI 19)• Dubai (1) : Dubai ANS DXB Thales (IC modification: II 03 SI 03)• Poland (1) : Polish AF Szypliszki (IC modification: II 01 SI 33)• Serbia (1) : SMATSA Koviona (to request the programming of the II/SI Code Operation)

• Modified IC allocations have to be programmed during the Implementation Period (before 03 November 2021)

• Implementation Sequence provides the sequence to follow to program IC allocations (new and modified) to avoid temporary IC conflicts

• Ad-Hoc (Avril 2021)• UK (1) : London Oxford Airport (IC modification: SI 35 SI 56)


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Implementation Sequence – Cycle 35


SMATSA Koviona MICA/ALLOC 1609

II/SI Code Operation enabled on II 08

SMATSA ME Vrsuta MICA/ALLOC 1608

New Radar Installation – SI 24

Polish AF Szypliszki MICA/ALLOC 1607

IC Modification: II 01 SI 33

Slovak Air Force MIL-SRE-LZMC MICA/ALLOC 1610


Croatia Control Konavle MICA/ALLOC 1588

Coverage reduction on SI 19

BULATSA Varna TAR MICA/ALLOC 1587


The purpose of MICA/ALLOC 1592 is to free the II code 03. That will enable UAE Air Force and Air Defence E9-027 Mode S radar to operate without lockout override on SI 19.

Ad-Hoc 26 February 2021UAE Air Force and Air Defence E9-027

MICA/ALLOC 1579SI = 19 (matching II 03)

MICA Cycle 35Dubai ANS DXB Thales

MICA/ALLOC 1592IC Modification: II 03 SI 03

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Global Overview – MICA Cycle 35 and Ad-Hoc


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Global Overview – MICA Cycle 35 and Ad-Hoc (2)


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Next Cycle – Mode S IC Allocation Cycle 36

Key dates of the MICA Cycle 36:• Start of MICA Cycle 36 (Requirements Freeze Date) : 04 November 2021

• Draft Proposals Issue Date (start date of Review Period) : 02 December 2021

• State Agreement : required by 30 December 2021 (expected end date of Review Period)

• IC allocations issued on 13 January 2022

• Implementation Period: 27 January 2022 – 20 April 2022

IC application whose planned date of first transmission falls before the end of MICA Cycle 37 will be processed in MICA Cycle 36.

Mode S Code Allocation – Cycle 35Interrogator Status 8

IC applications whose planned date of first transmission falls before 05 October 2022 will be processed in MICA Cycle 36

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IC Allocation Principle

• In ICAO EUR region, II codes and matching SI codes are allocated to Mode S radar with overlapping coverage :• Mode S radar operating on SI codes have to enable the II/SI Code Operation

• To acquire on the matching II code aircraft which are not SI capable• Aircraft which are not SI capable shall not be locked on the matching II code to enable the acquisition by

other Mode S radar operating on the matching II code or on SI codes matching the II code• Mode S radar operating on II codes have to enable the II/SI Code Operation

• To not lock on the II code aircraft which are not SI capable in order to enable the acquisition by Mode S radar having an overlapping coverage and operating on SI code matching the II code

• In ICAO MID region, II codes and matching SI codes are not allocated to Mode S radar with overlapping coverage:• IC allocations on II codes are removed in order to allocate the 4 SI codes matching the II code• Mode S radars operating on SI codes have to enable the II/SI code operation:

• To acquire on the matching II code aircraft which are not SI capable• Aircraft which are not SI capable shall not be locked on the matching II code to enable the acquisition by

other Mode S radar operating on SI codes matching the II code• 1 exception - NANSC Mersa Matruh ERR on II 06 and NANSC Luxor on SI 54


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Difficulties and Shortfall of IC

• Shortfall of IC happens more and more often during the Ad-Hoc process

• Main Causes:• SI code and II/SI Code Operation still not supported by all Mode S radar in ICAO EUR region

• outside EU region where it is required by Commission Regulation (EC) No 262/2009• Short notice IC applications for operational Mode S radars in region where there is no free IC

Ad-Hoc process applied (no modification of existing IC allocations during the Ad-Hoc process)

• No expected shortfall of IC during normal MICA Cycle• IC allocation may be very difficult for Mode S radars not supporting SI code and II/SI Code

Operation.Mode S Interrogator Code Allocation Status – Cycle 35 10

Submit IC applications on time on the MICA website https://ext.eurocontrol.int/mica/

IC applications should be submitted one year before the planned date of first transmission of a Mode S radar to reduce difficulties in the IC allocation processing.

https://ext.eurocontrol.int/mica/

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Difficulties and Shortfall of IC (2)

• In the event of shortfall during the Ad-Hoc process, the following approach is applied:• Discussion with national Focal Point(s) and Mode S Operator(s) to find an acceptable solution• If the radar first transmission can be delayed, the IC application is processed in the next MICA

Cycle• If the radar first transmission cannot be delayed:

• Temporary IC allocation in Ad-Hoc with some acceptable operational constrains, e.g. • coverage reduction, • temporary IC allocation on TRD Interrogator Code, • operation with lockout override…

• The IC application is reprocessed in the next MICA Cycle

• Apply preventive approach during MICA Cycle to ensure there is always a free SI code?• Request preventively that II/SI Code Operation is enable on some Mode S radar operating on II

code• Change preventively the II allocated to some radar (e.g. IC allocation of SI code instead of II code

to free the 4 matching SI codes)


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Interrogator Code Conflict #1

• IC conflict impacting NATS Cromer on II 11 reported on 10th December 2020• Analysis showed it commenced on 16th October 2020

• Source of IC conflict: Royal Danish Airforce AAL Mode S radar

• Reason of the IC conflict: • II 11 allocated to AAL Mode S radar during MICA Cycle 28 (ALLOC 1335)

Document Confidentiality Classification: White/Green/Amber/Red 12

• During the maintenance of the radar on 16th October 2020, the new EMS coverage map has been loaded in the radar.

• The system was not rebooted after the EMS map programming, and the new IC was not applied to the running configuration

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• IC conflict impacting ANS CR Bukop on SI 07 reported on 20 April 2021• Same IC conflict already reported on 25th January 2021 (reported in previous NSUR meeting)

• Source of IC conflict: Polish AF GCA 2000M Gdynia-Oksywie Mode S radar

• Reason of the IC conflict: • SI 07 allocated Ad-Hoc to GCA 2000M Gdynia-Oksywie Mode S radar in 2017, with Surveillance

range = 100NM and Lockout range = 95NM (ALLOC 1244)


• GCA 2000M Mode S radars do not support the programming of EMS coverage map and the programming of surveillance/lockout range in NM.The transmitted power is adapted to achieve the requested range… A new software is under development to correct that limitation

• In January 2021, a new rotary has been installed. The power was set for an operational coverage of 80-90NM. Due to software issue, the interrogator changed automatically the power to the maximum.

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• IC conflict impacting Peel Airports Doncaster on SI 54 reported on 3rd February 2021• IC conflict suspected from Summer 2020.• Analysis performed mid December by NATS to confirm the IC conflict

• Source of IC conflict: Belgian MoD Semmerzake Mode S radar

• Reason of the IC conflict:

Document Confidentiality Classification: White/Green/Amber/Red 14

• SI 54 allocated to Semmerzake Mode S radar during MICA Cycle 14 (ALLOC 709) with some coverage reduction due to Peel Airports Doncaster and Cardiff Airport also on SI 54

• During the maintenance of the radar on 16th June 2020, a new software has been tested and then the old software has been re-installed without the coverage maps

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Coordination with ICAO APAC

• Coordination with ICAO APAC Regional Office :• 2 new Mode S radars installed in eastern Russia

whose the coverage overlaps China and Japan• IC allocations issued Ad-Hoc in February 2021

• Further discussion required to improve coordination between ICAO regions• Meeting end of March 2021 to present the IC allocation

process applied in the ICAO EUR region


• 12 Mode S radars planned to be installed in Afghanistan • Afghanistan is under responsibility of ICAO APAC Regional Office• The coverage of some radar is overlapping the ICAO EUR region or ICAO MID region

• Coordination with ICAO APAC Regional Office to allocate an IC to these radars • to ensure there is no coverage overlap with Mode S radar operated in ICAO EUR and MID region• to record the planned IC allocations and prevent any future conflict on these IC

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Interrogator Code Allocation Plan

Cycle 35 and Ad-Hoc

Surveillance and Lockout Coverage

Note: the Mode S radars operating on II code which have to enable the II/SI code operation are identified in the maps below


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II Code 01 – Cycle 35 – Surveillance and Lockout Coverage


Polish AF SzypliszkiIC change II 01 SI 33 *

Cycle 35

* cf Implementation Sequence

II/SI

II/SI

II/SI

II/SIII/SI

II/SI

II/SI

II/SI

II/SI

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II Code 01 – Cycle 35 – Surveillance and Lockout Coverage (2)


State ATM Corporation RS JiganskNew Mode S radar

Ad-Hoc – June 2021

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SI Code 01 and SI Code 17Cycle 35 – Surveillance and Lockout Coverage

SI Code 17


SI Code 01

Slovak Air Force MIL-SRE-LZMCNew Mode S radar *

Cycle 35


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SI Code 49


SI Code 33

Polish AF SzypliszkiIC change II 01 SI 33 *

Cycle 35


NANSC FarafraNew Mode S radar

Cycle 35

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II 01 vs SI 01, SI 17, SI 33 and SI 49Cycle 35 – Lockout Coverage


II/SI

II/SI

II/SI

II/SIII/SI

II/SI

II/SI

II/SI

II/SI

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NANSC SiwaNew Mode S radar

Cycle 35

II/SI

II/SI

II/SI

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Dubai ANS DXB ThalesIC change II 03 SI 03

Cycle 35

DFS North Cluster: 8 Mode S radar

II/SI

II/SI

II/SI

II/SIII/SI

II/SI

II/SI

RAF Whittering Deployed II/SI

Belaeronavigatsia Minsk-2

II/SI

NANSC Sharq El OweinatNew Mode S radar

Cycle 35

State ATM Corporation Talovaya

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SI Code 03 – Cycle 35 – Surveillance and Lockout Coverage


Dubai ANS DXB ThalesIC change II 03 SI 03

Cycle 35

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UAE Air Force and Air Defence E9-027New Mode S radar

Coordination required with Dubai ANS DXB Thales

Ad-Hoc – March 2021

Croatia Control KonavleCoverage reduction *

Cycle 35

BULATSA Varna TARNew Mode S radar *

Cycle 35

* UAE Air Force and Air Defence E9-027Lockout Override requested as long as Dubai ANS DXB Thales Mode S radar operates on II 03, to ensure that aircraft which are not SI capable are correctly acquired.Lockout Override will be stopped once Dubai ANS DXB Thales Mode S radar operates on SI 03.


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SI Code 51


SI Code 35

London Oxford AirportIC change SI 35 SI 56

Ad-Hoc – April 2021

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II 03 vs SI 03, SI 19, SI 35 and SI 51 Cycle 35 – Lockout Coverage


II/SI

II/SI

II/SI

II/SIII/SI

II/SI

II/SI

RAF Whittering Deployed II/SI

Belaeronavigatsia Minsk-2

II/SI

State ATM Corporation Talovaya

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II/SI

II/SI

II/SI

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Israeli Air Force GCU North 2IC allocation withdrawn

March 2021

NANSC Cairo approachNew Mode S radar

Cycle 35

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GAF MilFS West Cluster: 5 Mode S radar

AZANS FuzuliNew Mode S radar

Cycle 35

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Kent International Airport IC allocation withdrawn

June 2021

NANSC El DakhlaNew Mode S radar

Cycle 35

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SI Code 52 – Cycle 35 – Surveillance and Lockout Coverageskeyes OS-CMB-S


skeyes EBOS

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II 04 vs SI 04, SI 20, SI36 and SI 52Cycle 35 –Lockout Coverage


II/SI

II/SI

II/SI

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II Code 05 – Cycle 35 – Surveillance and Lockout Coverageskeyes SH-CMB-S

II/SI

II/SIII/SI

II/SI

II/SIII/SI

II/SI


Abu Dhabi Airports Company AUH

GACA RAFHA

II/SI

II/SI

GACA RAFHA

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SI Code 05

SI 05 will be the IC of the new RNLAF Cluster.MassDeKooy is the first radar of the new

RNLAF Cluster


SI Code 21

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SI Code 37 and SI Code 53 Cycle 35 – Surveillance and Lockout Coverage

SI Code 37


BULATSA Sofia TAR

AustroControl KOR

French MoD MBA 3D VillacoublayNew Mode S radar

Cycle 35

SI Code 53

BULATSA Sofia TAR

skyguide SCHS

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II 05 vs SI 05, SI 21, SI37 and SI 53Cycle 35 – Lockout Coverage


II/SI

II/SIII/SI

II/SI

II/SIII/SI

II/SI

Abu Dhabi Airports Company AUH

GACA RAFHA

II/SI

II/SI

GACA RAFHA

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II/SI

II/SI

II/SI

skeyes Saint-Hubert Mode SNew Mode S radar

Cycle 35

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SI Code 06 – Cycle 35 – Surveillance and Lockout CoverageRename skeyes Charleroi Florennes FS-CMB-S


skyguide GVA1

skyguide GO1S

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RAF Robertson BarracksDue to building work at RRH

Trimingham, the radar is moved temporarily to RAF Robertson Barracks

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SI Code 38 – Cycle 35 – Surveillance and Lockout CoverageRename skeyes Bertem On BT-CMB-S


UkSATSE ODESA-2

GAF MilFS North Cluster: 5 Mode S radar

ENAV Ronchi

Italian Air Force CAPO RIZZUTOIC allocation withdrawn

April 2021

UkSATSE ODESA-2

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GAF MilFS South Cluster: 4 Mode S radar

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II 06 vs SI 06, SI 22, SI38 and SI 54Cycle 35 – Lockout Coverage


II/SI

II/SI

II/SI

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RNLAF Cluster : 5 Mode S radar

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

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GAF MilFS South Cluster: 4 Mode S radars

SI Code 23


DHMI Istanbul New Airport

SI Code 07

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SI Code 55


skyguide MEIS

SI Code 39

NANSC Marsa Martrouh 2New Mode S radar

Cycle 35

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II 07 vs SI 07, SI 23, SI 39 and SI 55 Cycle 35 – Lockout Coverage


II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

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II Code 08 – Cycle 35 – Surveillance and Lockout Coveragereplace skeyes Brussels BR-CMB-S



II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

Austro Control Linz

II/SI

SMATSA KovionaII/SI code operation requested *

Cycle 35

II/SI

Austro Control Linz

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Swiss Air Force Swiss-Alps Cluster : 4 Mode S radar

SMATSA ME VrsutaNew Mode S radar *

Cycle 35


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NANSC Abu SimbelNew Mode S radar

Cycle 35

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London Oxford AirportIC change SI 35 SI 56


Swiss Air Force Swiss-Alps Cluster : 4 Mode S radar

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II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

Austro Control Linz

II/SI

II/SI

Austro Control Linz

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DFS North Cluster – fallback code

DFS South Cluster – fallback code

II/SI

II/SI

II/SI

II/SI

II/SIII/SI

II/SI

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SI Code 25


ENAV Roma Fiumicino APP I (FS)

SI Code 09

NANSC Sidi BaraniNew Mode S radar

Cycle 35

Bulgarian AF Trud

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Bulgarian AF Krumovo

SI Code 41

ENAIRE El Judío (LEJD)New Mode S radar

Cycle 35

SI Code 57

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II/SI

II/SI

II/SI

II/SI

II/SIII/SI

II/SI

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II/SI

II/SI II/SIII/SI

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SI Code 10


GAF Geilenkirchen (GN)

SI Code 26

Italian Air Force PORTOGRUAROIC allocation withdrawn

April 2021

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SI Code 42


SI Code 58

Belgian MoD Kleine-Brogel

Polish AF NUR-12ME RadoszkiNew Mode S radar


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II/SI

II/SI II/SIII/SI

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DFS South Cluster: 7 Mode S radar

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Israeli Air Force GCU South 2IC allocation withdrawn

March 2021

GAF MilFS West Cluster: 5 Mode S radar

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GAF MilFS North Cluster: 5 Mode S radars

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II 12 vs SI 12, SI 28, SI 44 and SI 60Cycle 35 –Lockout Coverage


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II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

NANSC El KhargaNew Mode S radar

Cycle 35

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SI Code 13

GAF North East Cluster – fallback code

GAF North West Cluster – fallback code

GAF South Cluster – fallback code

GAF South Cluster: 6 Mode S radar

SI Code 29

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GAF North West Cluster: 6 Mode S radar

SI Code 45


Romanian AF SSR-TPS-77 BAIA

GAF North East Cluster: 6 Mode S radarSI Code 61

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II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

II/SI

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Test, Research and Development

• 50 TRD Mode S interrogators sharing II 14, SI 14, SI 30, SI 46 or SI 63• Some TRD Mode S interrogators have been allocated II 14 and temporarily a matching SI

Code (SI 14, SI 30, SI 46 or SI 62)


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TRD - II 14 - Cycle 35Google Map screenshot from the MICA website on 6th September 2021


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TRD – SI 14 and SI 30 - Cycle 35Google Map screenshot from the MICA website on 6th September 2021


SI Code 14 SI Code 30

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TRD – SI 46 and SI 62 - Cycle 35Google Map screenshot from the MICA website on 6th September 2021


SI Code 46 SI Code 62

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Update of MICA Spec

• EUROCONTROL Specification for the Mode S IC Allocation Coordination and IC Conflict Management (EUROCONTROL-SPEC-0153) updated in June 2021 (v1.0 to v2.0)• Update for compliance with (EU) 2019/123 • Nomination of ICAO Regional Officer • Nomination of ICAO MID State Focal Point • Focal Point responsibilities • Coordination with adjacent ICAO Regional Offices • Clarifications about submission of IC applications • Clarifications about shortfall of IC and Implementation Sequence

• Informal review by MICA Focal Points from 05 July to 11 August 2021• Few comments received

• Formal review launched very soon


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Upgrade of MICA Tools

• ICAT+ and SMGET developed early 2000s: • ICAT+: Microsoft Visual Studio .NET 2002 C++• SMGET: Microsoft Visual Studio .NET 2003 C++

• ICAT+ and SMGET being currently upgraded to Microsoft Visual Studio .NET 2017• Complete validation (tools and documents) will be performed


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Information and Contact

• EUROCONTROL website• https://www.eurocontrol.int/function/mode-s-interrogator-code-allocation

• MICA website• The access to the MICA website is managed through the EUROCONTROL OneSkyOnline portal.• Direct link : https://ext.eurocontrol.int/mica/

• EUROCONTROL MICA Cell contact• [email protected]

MICA website User Guide 83

https://ext.eurocontrol.int/mica/

Documents

Mode S Interrogator Code Allocation Status