Safety Function for Route Adherence Monitoring processing (or similar) implemented in the ADS-B tracks automation system for ADS-B tracks.
Comprehensive Tested and proven ADS-B ground stations testing of ADS-B with comprehensive checking of integrity Ground System data (e.g. use of checksums in ADS B messages) are used
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 15 Satellite Failure - Predicted (NANU)
Generic Description
Possible loss of ADS B service due to loss of good NUC from some aircraft.
Hazard Cause/Initiating Events
ADS B tracks will not be displayed on the controller HMI therefore will cause an increase in workload due to the
requirement to transition back to procedural control.
Risk Likelihood Consequence Risk Initial Risk Probable Cat 4 D Residual Probable Cat 4 D
Existing Mitigation
Safety Requirement Details
BARO aiding for Ensure BARO aiding available if required navigator
On-line integrity A site monitoring system shall provide a monitoring using site degree of on-line integrity monitoring. A monitor warning shall be issued to ATC if the site monitor is not received or indicates a low NuC value
Procedure for RAIM Ensure satellite outages are taken into predictions and account in RAIM and ensure procedures updates (distribution of RAIM predictions and updates) and instructions available
(including training)
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 16 Satellite Failure - Unpredicted Detected by FDE 4Nm Detected by FDE- 4Nm Oceanic FDE Satellite Failure - Unpredicted - Detected by FDE- 4Nm Oceanic FDE Satellite Failure - Unpredicted - Detected by FDE - 4Nm Satellite Failure - Unpredicted - Detected
Generic Description Satellite Failure - Unpredicted - Detected by FDE- 4Nm Oceanic FDE leading to the navigator flag reduced NUC. RAIM loss leading to possible loss of ADS B
Hazard Cause/Initiating Events Loss of ADS-B positional data to the controller. Increase in workload due to transitioning period back to procedural control and reassess traffic.
Initial Risk Residual
Risk
Likelihood Improbable Improbable
Consequence Cat 3 Cat 4
Risk D D
Existing Mitigation
Safety Requirement Details
Procedures for Ensure procedures as per radar - revert back reverting to Flight to Flight Plan Track, is availlable for ADS B Plan Track
BARO aiding for Ensure BARO aiding available if required navigator
On-line integrity A site monitoring system shall provide a monitoring using site degree of on-line integrity monitoring. A monitor warning shall be issued to ATC if the site monitor is not received or indicates a low NuC value
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