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Performance-based Communication and Surveillance (PBCS) Monitoring

This webpage contains the monitoring results of the actual surveillance performance (ASP) and actual communication performance (ACP) for US Operators. These results support evaluation of the initial and continued compliance with the transaction time requirements for required communication performance (RCP) specification RCP240 and data delivery time requirements for required surveillance performance (RSP) specification RSP180.

The FAA policy for issuing RCP and RSP approvals can be found at: FAA Flight Standards Service - Performance Based Flight Systems Branch.

Additional tools and information to support PBCS approvals and monitoring can be found at the website of the FANS Central Reporting Agency (CRA), also known as the Data Link Monitoring Agency (DLMA) in the North Atlantic region. FANS Central Reporting Agency

Approvals for RCP240 and RSP180 are required for use of performance-based airspace as defined in International Civil Aviation Organization (ICAO) Procedures for Air Navigation Services / Air Traffic Management (PANS-ATM, Doc 4444). Aircraft that have been granted approval by their State of Registry/Operator file the appropriate flight plan codes in fields 10 and 18 to indicate eligibility.

The ASP is measured using the one-way transit times of Automatic Dependent Surveillance Contract (ADS-C) downlink reports. The ACP is measured using the roundtrip transit times between uplink Controller Pilot Data Link Communication (CPDLC) intervention-related messages and the responding downlink WILCO messages.

For questions concerning monitoring results or for further information please contact: 9-ACT-FAA-PBCS-Monitoring

PBCS Background

The Performance-based communication and surveillance (PBCS) concept provides a framework for managing performance of the communication and surveillance aspects of air traffic management (ATM) with a purpose of ensuring that emerging technologies for communication and surveillance that are designed to support ATM operations are implemented and operated safely. PBCS involves globally coordinated and accepted specifications for RSP and RCP, comprised of allocated criteria for the components of the communication and surveillance systems involved, i.e. aircraft system, aircraft operator, air navigation service provider (ANSP), satellite service provider (SSP)/communication service provider (CSP).

In November of 2016, amendments to the following International Civil Aviation Organization (ICAO) annexes and documents incorporated provisions for the application of PBCS:

  • Annex 6, Parts I and II - Operation of Aircraft
  • Annex 11 - Air Traffic Services
  • Annex 15 - Aeronautical Information Services
  • Procedures for Air Navigation Services / Air Traffic Management (PANS-ATM, Doc 4444)

Supporting guidance material is contained in the PBCS Manual (ICAO Doc 9869, 2nd Edition).

The purpose of the GOLD Performance Analysis Tool (G-PAT) is to support the air navigation service provider (ANSP) to perform the analysis prescribed in Appendix D of the PBCS Manual (ICAO Doc 9869), previously contained in the Global Operational Data Link Document (GOLD), for monitoring performance of the operational data link system in a given airspace. This tool is not typically used by operators.

The G-PAT creates performance charts illustrating the cumulative distribution for both the CPDLC and ADS-C performance measures in the format suggested in Appendix D of the PBCS Manual. The performance related to CPDLC messages is measured against the Required Communication Performance (RCP) specifications and the latency for ADS-C reports is measured against the Required Surveillance Performance (RSP) specifications described in the PBCS Manual.

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