Air Defense

Passive long-range 3D geolocation and tracking of aircraft, UAS & missiles

RFeye AirDefense is a wide-area 3D geolocation and intelligence system that can identify and track aircraft while remaining invisible to electronic detection. Its covert nature makes the system ideal for border monitoring, radar augmentation, target acquisition, spoofing detection and more. RFeye AirDefense solution uses 3D TDOA to achieve highly accurate tracking of RF emissions from objects such as enemy aircraft without emitting any electromagnetic signature that may give away your presence.

See without being seen

Most aircraft will emit some sort of RF signal, whether they know about it or not. From commercial ADS-B and Airband radio transmissions to military data links (Air-to-Air (A2A) and Air-to-Ground (A2G) tactical data links) and on-board radar.  RFeye AirDefense is able to detect and geolocate these transmissions to individually identify airborne targets and determine their flight characteristics (including current location, heading, speed, flight path, and altitude). This data can further be used to establish flight envelope characteristics such as climb and turn rates, acceleration rates, etc.

While you can monitor the aircraft from their RF transmissions, they won’t be able to see you. RFeye AirDefense is completely passive and doesn’t emit signals that could compromise your position.

RFeye AirDefense is an essential addition to situational awareness in both testing and battlespace environments.

Augment your existing radar systems

RFeye AirDefense can operate as a standalone tracking solution, or it can be used to complement existing air monitoring solutions such as radar.

Radar is an extremely effective solution for pinpointing aircraft locations, but it is not free of limitations.  Tracking hostile aircraft using a radar when they are too far away to get a precise location, or too far away for effective deployment of surface-to-air missiles,  can enable opposing forces to geolocate the radar station and, either change their flight path in order to avoid being detected or, in a combat situation, destroy the radar with a radar seeking missile.

RFeye AirDefense can be used to passively detect the hostile aircraft without them being aware they are being tracked. This can provide essential covert intelligence on enemy activity and also augment a friendly missile defense system by tracking emitted RF signals until the aircraft is in the range, at which point radar can be safely activated with a short-range pulse to pinpoint and engage the incoming threat.

Analyze radar signals

Detect unauthorized drones

The availability and popularity of commercial drones is a growing nuisance and credible threat to military bases and airfields. This could be the relatively low-level threat of a drone enthusiast carrying out video surveillance of the local military test range or an insurgent group using drone-mounted explosives to carry out attacks on forces during active operations.

Control links for navigation and video links for reporting back surveillance streams both emit an RF signature which can be detected and tracked in three dimensions.

> More information on drone detection


Using a state-of-the-art network of RFeye Receivers alongside our advanced software, 3D geolocations can be performed in conjunction with all of your other spectrum monitoring, management and geolocation requirements.

Results can be displayed in any number of user definable ways. Display results using color codes to represent distance, signal strength, signal type etc. Identify specific transmission types and have geolocations fade over time to build the perfect intelligence picture for your application.

The ultra-low noise figures achieved by our RFeye Node platform mean we see further, and with more clarity. In practice, this means RFeye AirDefense can track aircraft many hundreds of kilometers away from the ground sensors. Our own test deployments track aircraft across a 900Km airspace.

Download brochure
RFeye AirDefense
Get in touch

Speak to an application specialist

Get in touch

Further reading

What is 3D TDOA?

The basics of 3D geolocation

3D TDOA Whitepaper

Operating principles of 3D TDOA

ADS-B Spoofing Detection with 3D TDOA

Augmenting Radar Systems with 3D TDOA

Tracking Multiple Targets with 3D TDOA