NATCA Bookshelf

National Office Update: Nov. 1, 2020

A publication of the National Air Traffic Controllers Association

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Mr. Bielek and Mr. Stachowiak want to know if there are any facilities right now not on Fusion? Please reach out to one of us and let us know at craigbielek@gmail.com or andrewjstachowiak@yahoo.com. We are always evaluating additional surveillance sources to help any Fusion related implementations. ADS-B Avionics Issues: An issue not screened by automation systems but an important assumption for future ADS-B dependent applications is the broadcast call sign of the user. ADS-B aircraft reports include this information, and automation systems compare it to the filed call sign. When a mismatch occurs, a Call Sign Mismatch (CSMM) alert can be generated. The issue has been highlighted in Equip 2020 meetings since ADS-B dependent applications (CAVS, Advanced Interval Management, etc.) are dependent on this functionality. Monthly tracking continues to show this as a significant problem. The SBS Article 114 workgroup has recommended disabling CSMM alerts across all automation platforms. NATCA SBS continues to work with the Agency toward a more proactive approach to ADS-B avionics issues that result in position error. These issues occur when standards for installation or configuration within aircraft or ground systems are not met. ADS-B is a cooperative surveillance source relying on position accuracy determined onboard the aircraft. Controllers and facilities are encouraged to report any identified events through ATSAP and via automation trouble reports. In order to reduce the number of safety compromising avionics events in the NAS, an effective, efficient response mechanism is needed. The Agency has deployed additional mitigations including Enhanced Validation (EV) and a No Services Aircraft List (NSAL). The NSAL (aka "blacklist") is effective in dealing with chronic non-compliant aircraft, but it lacks the ability to respond quickly. As such, it will likely always be needed as a backstop to compliance or enforcement issues. An issue identified and reported immediately takes a minimum of one day to place the aircraft on the NSAL. Enhanced Validation (EV) shows the most promise operationally as it is a real-time response to invalid ADS-B targets. The latest update to EV already deployed within 15nm around a Terminal Radar has shown positive results. Additional EV techniques are being analyzed, including expanding the range beyond 15nm and further increasing the responsiveness. SBS Engineering is working with Harris to incorporate these changes with additional EV parameters in 2018 and 2019. ASDE-X Tech Refresh: The team continues to work on the RU communication upgrade plan. The goal is to be as efficient as possible with minimal impact to controllers as this is an operational system. Testing in SYR continues. ASEPS (Space-Based ADS-B): Space-based ADS-B activities have started in ZMA. The team is currently working with ZMA and neighboring facilities regarding SOPs and LOAs. Space based will be used in Sectors 62 and 63 of ZMA. This is going to be the

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