Aircraft Automatic Dependent Surveillance - Broadcast (ADS-B) Verification and Validation

摘要

Automatic Dependent Surveillance -Broadcast (ADS-B) promises to provide significant operational enhancements to military and civilian applications. However, as currently designed, ADS-B will not necessarily provide guaranteed, uninterrupted state and intent data from ADS-B equipped aircraft. Data dropouts, erroneous inputs, and deception may degrade data integrity. To verify and validate (V&V) ADS-B reports, a system is being designed to provide continuous real-time state estimates of the aircraft being tracked and a verification that the aircraft is following the ADS-B broadcast intent. This system uses a suite of Kalman filters to smooth out noise within measured ADS-B signals, identify and suppress erroneous data, coast between data dropouts, and provide the current best state estimates. The bearing (electronically derived) to the ADS-B transmitter is used to verify that the signal is being received from the location identified in the ADS-B report. Finally, conformance metrics are defined to verify ADS-B intent data. We check aircraft states to verify that the aircraft lies within the horizontal and vertical Required Navigation Performance (RNP) limits and if the future intent of the pilot is to stay within the RNP limits or return to a track within the RNP limits.