MIDAS III: Analogue Clutter Mitigation System (ACMS)

MIDAS III: Analogue Clutter Mitigation System (ACMS)

The rotating blades of a wind turbine mimic the radar signatures of aircraft targets that the radars are designed to detect, so they can appear in the radar picture as areas of clutter. For a small wind farm, or one with widely spaced turbines, the MIDAS III can improve the safety of the radar service by mitigating the effects of turbine clutter at the point of display.


Key features

  • Downstream of all radar and display processing.
  • Solution is in the Video Domain.
  • Non-computational high speed logic processing (FPGA hardware).
  • Based on transition and clutter zones, using colour detection.
  • Toggles between two modes:
      • Continuous clutter sampling and removal (clear air).
    … OR …
    • Historic clutter removal (target crossing).
  • All SSR and Mode S target classes are unaffected.



Measured throughput: 32.8ms to 56.0ms.
MTBF: 127,220 hrs (MIL HDBK 217F).
Form factor 19” rack mount, 1U high.
Power supply: Dual redundant, 12V 5A (peak).
CE certification: Yes
ROHS compliant: Yes


Mitigation clutter method


Left: The diagrams show areas of clutter caused by the moving blades of individual wind turbines.

Centre: By detecting the clutter in clear air dimming the clutter, distractions are reduced.

Right: By applying the clear air clutterwhen an airicraft passes over the clutter it clarifies the radar presentation, although aircraft targets will have small gaps.


Release and General Information