Theia Benefits

Theia: a key enabler for Project Green Blade

Highly configurable conical array with a range of up to 54+nm (for phase 1 and up to 60nm for phase 2) and up to 360 degree Field of View.

Holographic Radar™ development is based on the goal of achieving a spectrum efficient, networked solution that can manage an extended airspace from ground level up to 60,000 ft.

Theia achieves immunity against wind farm false alarms

Theia is a next generation non-cooperative surveillance radar – new standards of performance (independently proven and field tested).  Surveillance of ALL the volume and ALL the targets ALL the time

  • Helicopter, propeller vs. jet plane, wind turbine
  • Clutter free – wind turbines
  • Spectrum efficient – L-Band, all HR units have the potential to use a single common frequency
  • High update rate – Up to 4x/sec
  • 3D radar – Position (x,y,z), velocity, detailed Doppler & target characteristics
  • Seamless, simple integration
  • Low cost of ownership -100% solid state, no moving parts or rotating joints

Theia, a staring radar, surveys its whole Field of Regard permanently rather than scanning around it

Theia dwells on all targets, all the time, yielding information to  characterise them in detail

Theia technology lends itself to a network approach to surveillance

Theia architecture and processing yield lower through life costs

Theia 384 was designed to provide extendable hemispheric coverage using building blocks and a modular design approach

Theia is the technology underpinning Project Green Blade and will continue to see continuous development in:

  • Target analysis/clutter discrimination (eg. aircraft vs wind turbines)

  • 4D+ target resolution

  • Spectrum efficiency

  • Networking capability

  • Capacity and Resilience


Theia continually observes every object to determine if there is a target or clutter. Based on high resolution target characterisation, Theia determines whether the target is a turbine blade or an aircraft. If there is a turbine blade AND an aircraft, it will report the aircraft.

Theia Innovative Technology

Prior to Project Green Blade, Theia had demonstrated that the 128-tile Quadrant, with a then range of up to 40nm and using its time- and frequency- domain signal discrimination, repeatedly and successfully rejected wind turbines and detected aircraft.

Phase 2 of the Project will see the Theia expanded to 768 receiver tiles to detect and correctly characterise aircraft and wind turbines at up to 60nm. From the 16 tile Theia deployed for East Midlands Airport, to the Project Green Blade Phase 2 Theia, the same COTS units are utilised.

Considering the various climatic conditions that exist in offshore wind farm locations, L band is resilient to precipitation – essential for operational support across Britain’s North Sea.