PilotAware incorporates fixed zones around your aircraft at all times during operation. (i) 'Outer Zone' 10Km and 2000ft. (ii) "Middle Zone" 5km and 1000ft. (iii) "Inner Zone" 3Km and 500ft. These are fixed and are not selectable.
When another aircraft transmitting GPS coordinates enters a ring, an alert will sound. i.e. "Traffic, 11 O'clock, 800 feet, 10 kilometres." This means a target is 30 degrees to your left 800 ft above. This type of voice alert will be given for PilotAware, FLARM and ADSB transmissions that deliver target GPS co-ordinates.
If the target transits through to the next zone then another alert will be given.
Unlike modern transmission that include a GPS position Mode S/C transmissions do not transmit GPS coordinates. Consequently voice alerts have to be in a different format.
Using Machine Learning algorithms to interpret the qualitative information of the signal strength from the Mode C/S 1090MHz transmission, the distance of the target can be rationalised relative to user configurable zones. (i) Long (ii) Medium (iii) Short (iv) Ultra short.
Vertical separation is calculated from the height transmitted from the Mode C/S target. A barometer on the PilotAware Bridge records local barometric pressure to ensure correct separation.
Local C/S targets appear in the PilotAware Radar Screen, through a notification banner in the top right-hand corner of the screen. Mode C targets will be annotated as Mode C with a given separation and a red, amber or green background depending on the proximity of the aircraft to you and the range chosen. Mode S targets will be annotated with the aircraft registration number, separation and a red, amber or green background depending on the range chosen.