# ADS-B safety parameters

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**UgCS**

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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 |