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should be corrected in the next 0.5 sec and could trigger a Automatic Position Report (APR) in the ground system.
The data is  protected by CRC checksum. 
Hazard Cause/Initiating Events A momentarily track jump similar to APR reporting  for radar track will occur 
 Risk  Initial Risk  Residual 
 Likelihood  Consequence  Risk  Improbable Cat 3 D  Extremely  Cat 3 D 
Existing Mitigation 

Safety Requirement Details  
  Safety Function for  Route Adherence Monitoring processing (or similar) implemented in the   ADS-B tracks automation system for ADS-B tracks.
Checking of ADS-B a/c Procedures shall be developed for cross   ident checking of ADS-B positional data with data    provided by other navigational systems (not   GPS) in certain circumstances.
Parity check on data  Ensure parity check is available for all data   transmitted transmitted
Coupling  Ensure REG and 24 bit code are required for   coupling. Also, ensure no coupling until   the flight plan is coordinated.

Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 26 GPS Antenna failure
Generic Description A GPS antenna failure causing the transponder to stop squitting when data is not refreshed every 2 secs. This has the same 
effect as an unpredicted satellite failure except it only affects one aircraft. There will be a loss of ADS B data
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  Remote  Improbable 
  Consequence  Cat 3  Cat 3 
  Risk  D  D 
Existing Mitigation 

Safety Requirement Details 
ADS-B Fallback  Validated and published instructions   procedure for reverting back to procedural control 
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 27 Incorrect 24 bit code
Generic Description
Incorrect 24 bit code programmed in the aircraft. This will cause a mismatch with the Flight Plan and incorrect TCAS 
operations. The effect is failure to couple or incorrect coupling. The probability of incorrect coupling is lower than

SSR 
because the code is set by maintenance and not the pilot.

Hazard Cause/Initiating Events Incorrect coupling
  Initial Risk  Residual 
Risk 
  Likelihood  Occasional  Remote 
  Consequence  Cat 4  Cat 4 
  Risk  D  D 
Existing Mitigation 

Safety Requirement Details 
Checking of ADS-B a/c Procedures shall be developed for cross     ident checking of ADS-B positional data with data    provided by other navigational systems (not   GPS) in certain circumstances.
Checking of 24 bit  Ensure 24 bit code is adequately checked at  code at installation  installation and the covered in the avionics    maintenance procedures
Detecting of incorrect  Ensure the ground test set detects the   24 bit code incorrect 24 bit code during installation    check and test.
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 28 Failure of Communications link
　
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