ADS-B is short for Automatic Dependent Surveillance-Broadcast

ADS-B is a technology that shows aircraft positions wherever they are, either in the air or on the ground. Every aircraft with “ADS-B out” sends data about its position. These data are intercepted via antennas that are connected to ADS-B receiver boxes. A GPS is connected to the receiver to indicate the placement of the receiver in the form of longitudes and latitudes. Furthermore, the receiver must be connected to power and internet to work. 

There is a big difference in the range an ADS-B receiver can cover signals from, it all depends on the placement of the antenna. Therefore, it is necessary to have receivers connected to several locations to get coverage in larger areas. At the same time, there is a difference in the level an aircraft is flying which makes it important to be able to intercept signals from different altitudes.

The higher the antenna is placed, the wider a range the receiver will most likely cover, because the signals will not be blocked by mountains or higher ground. Also, it’s an advantage to get antennas installed near airports, as they will intercept the signals from the aircraft already before departure. In this way, you can see the aircraft’s position all the way down to which gate and runway it’s located before take-off. The same applies when it arrives at a new airport with another ADS-B receiver installed. 

In addition to the aircraft’s position in longitude and latitude, the altitude of the aircraft is also registered. 

ADS-B Antenna BLL

ADS-B Antenna located in Billund, Denmark

Here you see the location of an AIR SUPPORT ADS-B Antenna located on the roof of the AIR SUPPORT Headquarters on Nimbusvej 9, Billund in Denmark.