[SystemSafety] Boeing 787 position flaw

Fri Dec 18 11:46:07 CET 2015

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Some info coming from my inquiry with a pal at Eurocontrol.

[begin quote]

[XYZ] had a quick look at the ADS-B Minimum Operational Performce Specification in ED102A. It
specifies the coasting behaviour of the ADS-B system in case of missing input data. But it is not
very specific on erroneous data.
ASTERIX Category 21 item 040, provides some means to forward the status of the target report to a
ground station, but coasting is not mentioned explictly.

[end quote]

This is consistent my hypothesis of a requirements gap - I'm still guessing that the situation is
that there is behavior not covered by the spec which turns out in retrospect to be unwanted. (ED
102A is expensive at €500, which is a bit more than I care to afford.)

Inquiry will continue after the holiday break.

PBL

Prof. Peter Bernard Ladkin, Faculty of Technology, University of Bielefeld, 33594 Bielefeld, Germany
Je suis Charlie
Tel+msg +49 (0)521 880 7319  www.rvs.uni-bielefeld.de