ADS-B safety parameters

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Main Page UgCS Connecting UgCS and microADS-B Receiver

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The parameters below specify a "safety cylinder" with radius H and height V. Each aircraft has its own cylinder, based on its type. A Kalman filter is used to detect potential convergence, i.e., the possibility that among each pair of aircraft at least one will enter another’s safety cylinder in T seconds. This is considered a pontential collision and a warning will be issued.

• The following values have been adapted for use with UgCS ADS-B collision warning service, among two classes of aircraft:

Values for vehicles controlled by UgCS (assumed to be drones):

Parameter Parameter Unit of measurement
H (horizontal distance) 20 Metres
V (vertical distance) 15 Metres
T (warning time ) 60 Seconds


Values for vehicles observed by UgCS (assumed to be planes, values based on ICAO recommendations): Parameter Value Unit of measurement

Parameter Value Unit of measurement
H (horizontal distance) 9260 (5) Metres (Nautical Miles)
V (vertical distance) 300 Metres
T (warning time ) 60 Seconds