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UgCS supports ADS-B (Automatic dependent surveillance-broadcast) receivers and transponders. When using an ADS-B receiver, UgCS will warn user about collision possibilities between vehicles. If using an ADS-B transponder, it is possible to configure and use it during flight with the help of UgCS.


UgCS gives warnings about dangerous convergences concerning vehicles controlled by UgCS, and vehicles observed by UgCS, via the microADS-B receiver.

ADS-B icon

To display the ADS-B monitor window, click on the ADS-B icon at the very top right-hand corner of the screen.

Figure . ADS-B monitor window

The calculation of the collision possibility is based on three parameters:
• H – horizontal distance (meters)
• V – vertical distance (meters)
• T – warning time (seconds)
Values for the vehicles, controlled by UgCS:
• H = 20 m
• V = 15 m
• T = 60 sec.
Values for the vehicles, observed by UgCS:
• H = 9 260 m (5 NM)
• V = 300 m
• T = 60 sec.
Warnings about possible collisions appear in the log window if vehicles, during the minimal convergence, would, in the future, violate both boundaries (H / V) of any other vehicle in a time less than T. A warning is not displayed if the minimal convergence occurred in the past and the vehicles fly apart from one another.
A warning is cleared if one of the following events occurs:
• The minimal convergence persisted in the past and the spread angle between the trajectories is more than 20 degrees;
• The minimal convergence persisted in the past and spread angle between the trajectories is less, than 20 degrees and the areas of the vehicles are not violated.
Warnings are created only for vehicles which have been added to the vehicle list. When control is released, all current alerts for that vehicle are removed.
An indicator in the top right corner shows whether any ADS-B receivers are currently connected. It is displayed green if a connection with at least one such device is active, and grey otherwise.


If your vehicle is equipped with an ADS-B Transponder or you wish to do so, it is possible to configure and transmit ADS-B messages using UgCS. As of this moment UgCS supports Sagetech XPS-TR Mode S transponders. The following main functions for ADS-B Transponder configuration and usage are available:
• To set ADS-B modes;
• To set parameters;
• To display annunciators;
The following list of parameters are available:
SQUAWK: must contain of four octal digits. Allowed digits are: 0, 1, 2, 3, 4, 5, 6, 7.
ICAO Address: must contain of six hexadecimal digits. Allowed digits: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.
Aircraft registration (tail number): must contain of up to 8 symbols. Allowed are: 0-9, A-Z.
Flight ID: must contain of up to 8 symbols. Allowed are: 0-9, A-Z.
IDENT* flag: Yes (single direction button)
External altitude: Yes/No

ADS-B settings menu for reference

Transponder parameter usage:
• ICAO Address and Aircraft registration/Tail number will remain the same for a specific vehicle in most of the cases. These parameters can be set in Vehicle Parameters section Vehicle parameter menu where Tail number and ICAO address can be set ).
• SQUAWK parameter can be defined when necessary any time during the flight ADS-B settings menu for reference.
• Flight ID should be set during preparation for take-off. That can be done in the Preflight section ADS-B settings menu for reference.

Vehicle parameter menu where Tail number and ICAO address can be set

Available transponder modes ADS-B settings menu for reference:
• OFF – Transponder is turned OFF
• STBY – Standby mode. Transmission does not happen, device is set to low power consumption, is ready for start-up with reduced warm-up time.
• ON – Transponder is transmitting and receiving data, but no altitude information is transmitted.
• ALT – Same as “ON” mode with the additional transmission of vehicle altitude.
The following error codes can be displayed:
• XPDR – General error code that is displayed if any of the following errors have occurred.
• TEMP – If transponder temperature sensor reports an error.
• GPS – Is displayed if there is no GPS signal.
• ICAO – If there is no valid ICAO address set.
• ES – Is displayed if the extended squitter has failed.

ADS-B settings menu displaying XPDR and GPS error codes