ATC
FAA plans follow-on to Alaskan ADS-B project
Buoyed by the success of its three-year ADS-B (automatic dependent surveillance-broadcast) operational evaluation project, named Capstone and centered on B

Buoyed by the success of its three-year ADS-B (automatic dependent surveillance-broadcast) operational evaluation project, named Capstone and centered on Bethel in western Alaska, the FAA plans next year to increase the number of participants and to implement a second, broadly similar project centered on Juneau, Alaska.

ADS-B, which is expected to play a key role in the future Free Flight era, is sometimes described as the next-generation transponder technology. This is because individual aircraft carry avionics units that transmit GPS position, altitude and intent once a second over a dedicated datalink, instead of being periodically interrogated by ground-based secondary radars, as is the case today.