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AUTOMATIC DEPENDENT SURVEILLANCE BROADCAST A D S - B CONTINUED FROM PREVIOUS PAGE 10 NextGen Now | Winter 2014 approximately once per second, Fusion tracker performance is greatly enhanced. Oceanic ADS-B operations are showing great potential with the advent of satellite-based ADS-B. NATCA continues to emphasize, in all environments, that surveillance and communication go hand in hand. As this technology moves from concept to reality, the potential surveillance enhancement may be quite extraordinary, but again dependent on aircraft equipage. ADS-B ENHANCES SURVEILLANCE, BUT IT IS S0 MUCH MORE ADS-B and technologies or applications that leverage ADS-B are being implemented under the umbrella of the FAA's Surveillance Broadcast Services (SBS) Program Office. This represents a wide spectrum of projects and programs. September 2014 marked the IOC date for Ground Based Interval Management with Spacing (GIM-S) at Albuquerque Center (ZAB). Thanks to the culmination of years of hard work, including NATCA teams at the national and local levels, this application is now in use. Time Based Flow Metering (TBFM) leverages ADS-B accuracy when issuing suggested speeds for spacing on the arrival into Phoenix. The GIM-S application is expected to expand nationwide. In 2009, the use of onboard ADS-B data allowed controllers and properly equipped aircraft to successfully demonstrate Flight Deck Interval Management with Spacing (FIM-S) capabilities. Hundreds of miles from their destination, aircraft were assigned a time interval based on what was needed at the final approach fix. The controllers responsible continued to monitor the aircraft and intervene if necessary. Pilots received constant speed updates based upon the aircraft they were assigned to follow and the interval. This concept continues to be refined in Advance Interval Management development. Interval Management (IM) operations can cover all phases of flight: from departure spacing, to supporting miles-in-trail operations, to spacing on arrival and approach. IM operations for arrival and approach are expected to provide more frequent use of Optimized Profile Descents, less vectoring at low altitudes, and increased throughput for major airports at peak time of activity. In Trail Procedures (ITP) is an application that uses ADS-B data in the Oakland Center (ZOA) oceanic airspace. Controllers can allow properly equipped ADS-B aircraft to reach a more fuel-efficient altitude on long haul routes. This test with the United Airlines partner has resulted in impressive fuel savings over the last three years. Vehicles at multiple airports across the NAS are being equipped with ADS-B as well to enhance surface

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