DF Accuracy Calculator+

An improved and mobile-friendly version

Right-click and drag (or Ctrl+drag) to tilt in 3D

1 · Define target area ▾

Click to add points, double-click to finish.

Tap to add points, tap ✓ Finish when done.

10° cone width

Each cone centers on the sensor → emitter bearing; half the width per side.

Tap the map to place. Drag to reposition.

Tap inside the polygon. Drag to move.

Target polygon

DF cone

Sensor

Emitter

Common overlap