N778XF was flagged over Santa Barbara County at -50 ft on Jul 27, 09:44 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
435 distinct aircraft. 438 records below 1,000 feet, 177 below 500 feet, 84 hovering.
The machine has not finished learning a baseline for this county yet.
Baseline is learned by the model from this county's own history — not compared against any other county, and not set by a person.
N778XF was flagged over Santa Barbara County at -50 ft on Jul 27, 09:44 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
N778XF was flagged over Santa Barbara County at -50 ft on Jul 27, 09:44 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
N907RD was flagged over Santa Barbara County at -125 ft on Jul 27, 08:56 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
N907RD was flagged over Santa Barbara County at -125 ft on Jul 27, 08:56 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
N132CA was flagged over Santa Barbara County at -125 ft on Jul 27, 08:30 PM PDT.
NEGATIVE_ALTITUDE_SPOOFING
Aircraft transmitting below-sea-level altitude - transponder spoofing evidence
Source: hourly_stats, county_baselines, sentinel_violations (quiet-math).