Safety Analysis of an Approach Spacing For Instrument Approaches (ASIA) Application Using ADS-B
2003 Award Winner
Jonathan Hammer, The MITRE Corporation
ABSTRACT
This paper illustrates new techniques being adopted by some members
of industry for analysis of the safety of aircraft surveillance applications.
The techniques are illustrated using the example flight deck application
of Approach Spacing for Instrument Approaches (ASIA). The techniques
include analysis of the operational procedures, conducting a hazard
analysis, and treating identified hazards in a fault-tree analysis.
The fault-tree analysis in turn results in requirements on various subsystems
that support the operational application.
The specific analysis of the approach spacing application results in
a requirement that the probability of presenting hazardously misleading
information be held to less than 10-5 per operation. The 10-5 value
represents "major" system criticality, and is a criticality
that is considered by avionics vendors to be achievable within reasonable
cost constraints. If the benefits of reduced spacing that are offered
by the approach spacing concept are significant enough to justify the
cost, users may find that it is worthwhile to equip their aircraft with
such a capability.
Publication
Air Traffic Control Quarterly, Vol. 11, No. 3, pp. 203-224,
2003.
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