Twenty First Meeting of the Africa-Indian Ocean Planning and Implementation Regional Group (APIRG/21) (Nairobi, Kenya, 9 11 October 2017)

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1 Twenty First Meeting of the Africa-Indian Ocean Planning and Implementation Regional Group (APIRG/21) (Nairobi, Kenya, 9 11 October 2017) Agenda Item 3: Performance Framework for Regional Air Navigation Planning and Implementation Performance Framework for Regional Air Navigation Planning and Implementation GOLD/PBCS/Data Link Monitoring (Presented by ASECNA) SUMMARY This working paper presents the state of implementation and monitoring of ADS-C and CPDLC in ASECNA FIRs and shows also the advantages as well as the operational issues encountered in the exploitation of these means. Strategic Objectives This Working Paper is related to Strategic Objectives: A, B & E References Conclusion 20/09 APIRG/20: Implementation of ICAO PBCS manual (DOC 9869) and GOLD Manual (DOC 10037) 1. INTRODUCTION 1.1 APIRG 20 meeting held in Yamoussoukro, Cote d Ivoire, 30 November 2 December 2015, invite states, Air Navigation Service Providers (ANSPs) and users to take necessary action to apply the technical and operational guidance provided in the Second Edition of Doc 9869 (Performance Based Communication and Surveillance (PBCS) Manual) and the Global Datalink (GOLD) Manual (Doc 10037) once published; States and ANSPs that have already implemented CPLDC/ADS-C have to review their systems performance using PBCS Manual and take immediate action where remedial measures are necessary In accordance with this recommendation and in order to improve the air navigation services, ASECNA took the decision to implement ADS-C and CPDLC in several centers. 2. IMPLEMENTATION 2.1. Since 2002, ASECNA started to implement ADS-C and CPDLC systems in several centers, including Dakar, Abidjan, Antananarivo, Brazzaville, Niamey and Ndjamena A complete simulator system is implemented at EAMAC in Niamey, to support the training of Air Traffic Controllers. 1

2 2.3. Systems deployed include the following functionalities: Flight Data Processing System (FDPS), Automatic Flight Data Processing (AFDP), Flight Plan Air Situation Display (FPASD) 2.4. A Flight Data Operator (FDO) position dedicated for the corrections of wrong filed flight plans as well as a simulator system for the on-job training are also implemented The table below recapitulates the implementation of the ADS-C and CPDLC : FIRs Implementation Date Status Operation Date Antananarivo 2002 Full 19/02/2004 Ndjamena 2007 Full 05/04/2012 Dakar 2005 Full 24/09/2009 Niamey 2007 Full 01/07/2010 Abidjan 2009 Full 01/07/2010 Brazzaville 2009 Full 05/04/2012 EAMAC 2006 Training system - 3. ADS-C/CPDLC MONITORING PERFORMANCE 3.1. The provision of the data link service to aircraft is provided through an ATS AIRCOM service provided by SITA which undertakes to transmit monthly the measurement of traffic performance of ADS-C and CPDLC connections. These statistics show: FANS traffic statistics with the global datalink traffic and the traffic by media and airlines; FANS performance with the service availability, RGS and GES availability, the uplink success rate and the uplink reject rate Micro failures in the ACARS link are reported from time to time. Consequently, ASECNA and SITA coordinates quickly to restore the link availability. 2

3 3.3. The results compiled in July 2017 are presented in the table below: Centers ASA Aircom Service Service DHP Satellite Service DHP Abidjan Brazzaville Dakar Ndjamena USR Uplink success rate= 1 Servic e Satellite Service UDT Uplink messages Delivery Time FANS (< 120s ) FANS (< 360s ) Obs. Good USR and UDT performance. Good availability (affected mainly by NDJ breakdowns) Good USR and UDT performance. availability was affected by the suspension of the BGF station - the service was available Very good performance ( availability affected by BKO station failures) Good performance ( availability affected by suspension of BGF station and NDJ breakdowns) - service was 3

4 available Niamey NA NA Good performance Nouakchott NA Madagascar Good performance Good performance ( availability was affected by faults in DAR and BUQ stations) 3.4 FANS Reliability performance FANS Services AFN (Log-on) CPDLC ADS TOTAL Success / Reject Last 3 Last 12 Jul-17 Rate Months Months Jul-17 Last 3 Last 12 Months Months Jul-17 Last 3 Last 12 Months Months Jul-17 Last 3 Last 12 Months Months Messages Delivered No Ack + NAK No Ack NAK No Station To Not Logged On Message Too Old Other SITA Rejects Internetworking Rejects No Ack Not Logged On NAK No Station To Message Too Old Other SITA Rejects Internetworking Rejects Messages Delivered 10 TOTAL TRAFFIC 4

5 3.5 AIRCOM FANS service availability Service FANS AIRCOM Processor Satellite FANS AIRCOM Processor Access Network Satellite Access Network FANS Service Satellite FANS Service # of outages Shortest Duration Average Duration Longest Duration Total 3-month Duration average 12-month average Satellite FANS Service availability FANS Service availability 3.6 FANS service performance (+SAT) Uplink Message Delivery Time 10 s 20 s 30 s 40 s 50 s 60 s 100 s 120 s 180 s 360 s >360 s ATS Provider AFN (Log-on) CPDLC ADS

6 FANS Uplink Delivery Time AFN CPDLC ADS 6 UP_10S UP_20S UP_30S UP_40S UP_50S UP_60S UP_100S UP_120S UP_180S UP_360S >360 S Downlink Message Delivery Time 10 s 20 s 30 s 40 s 50 s 60 s 100 s 120 s 180 s 360 s >360 s ATS Provider AFN (Log-on) CPDLC ADS FANS Downlink Delivery Time 9 AFN CPDLC 5 4 ADS 3 UP_10S UP_20S UP_30S UP_40S UP_50S UP_60S UP_100S UP_120S UP_180S 6

7 Area Control Center Antananarivo Ndjamena Niamey Dakar Abidjan Brazzaville State of implementation of CPDLC since 2001 since 2009 since 2009 since 2008 since 2009 since april 2012 Ground traffic in messages (Uplink and Downlink) Percentage of message delivered (reliability) Percentage of messages rejected Procedural error by Co ,92 0,05 0, ,76 0,16 0, ,84 0,07 0, ,84 0,04 0, , ,95 0,05 0,02 FANS service availability 12 month average Service co- co- co- co- co- co- Percentage of Traffic by media 97,03 13,47 99,99 79, ,37 82,57 3, , , , , ,30 96,93 10, , ,35 89,87 10, , ,00 91,44 3, , ,87 4. ADVANTAGES AND ENCOUNTERED PROBLEMS NETWORKS 7

8 The percentage of aircrafts equipped by ADS-C and CPDLC is increasing slowly However, it is still low to take complete advantage of the systems. Also, it is obvious that the increase of ADS- CPDLC equipped aircraft will improve the air navigation safety; The use of CPDLC at the boundaries of FIRs is useful and supplies AMS on HF/ The whole ADS procedures of the GOLD are not used yet, as the call by the aircraft for a contract (AFN log-on) before FIR entry. Some airlines didn t use the ADS- C/CPDLC systems even when the aircraft has the capability. It may decrease the rate of bad coordination; The flight plan missing issue and the bad filling of flight plans, impact on the operation of the system; such problems must be discussed properly. 5. ONGOING IMPROVEMENT PROJECTS TO ENHANCE THE SAFETY 5.1. To meet regional and international requirements, ASECNA is pursuing its policy of improving its means of communication with the following orientations: Strategic orientation Plan (POS) adopted in 2011; Extension of Radar and ADS-C surveillance and CPDLC services to the following centers: Bamako, Bangui, Bissau, Cotonou, Douala, Libreville, Lome, Malabo, Moroni, Nouakchott, Ouagadougou; Implementation of a datalink architecture AFISNET 8

9 Infrastructure SITA connectée des liaisons louées IPVPN Intelsat 10-2 Transponder ASECNA IPVSAT SITA DAKA ABIDJAN ACSN Sites ATM (TOP SKY) ASECNA FUCHSSTAD Serveurs Centraux Aircom SITA 6. ACTION BY THE MEETING The meeting is invited to: Take note of the information communicated above; Make recommendation to airliners to take the appropriate measures to equip aircrafts with ADS-C and CPDLC. This will enhance the level of safety in AFI Region; Encourage Airlines to report the events to improve the monitoring of the systems. END 9