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occurrences, the Agency's ability to respond has been hampered by a lack of resources, bureaucracy, and legal constraints. 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. Multiple ATSAP reports have been filed on the known issues to date. Controllers and facilities are encouraged to report any identified events through ATSAP and any other mechanism. • In order to reduce the number of safety compromising 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). o 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. o 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 diligently with Harris to incorporate these changes with additional EV parameters in 2018. With 2020 approaching rapidly, these changes are needed sooner rather than later to limit the sporadic effects of non-compliant avionics. Advanced Interval Management (IM) • We met and discussed a third-party Flight ID with American Airlines, ALPA, and APA on Oct. 25 as part of the AIRS (ADSB-In Retrofit Spacing) Program. We discussed the controller's benefit to use callsigns in communication rather than Flight ID. Safety concerns from pilots were voiced and understood, however, the pilots seemed to also understand a controller's need to keep phraseology consistent. • The AIRS Time-Based Spacing demo for ZAB controllers will be held at MITRE in December, previously scheduled in November, to fully illustrate the advantages of time- based spacing in comparison to today's distance-based operation. • The A-IM special committee met and discussed the future of CAVS (CDTI Assisted Visual Separation). The need for an indication on the scope for terminal controllers was expressed, should any further discussions move forward. This indication would provide controllers a means of knowing who was equipped to better serve the user by increasing efficiency. ASDE-X Tech Refresh • Deployment of the latest tech refresh build is nearly complete. SAN will be next to receive the software updates. ASEPS

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