Direction finding

A Direction finder estimates where a signal comes from, using a coherent array. Triangulation crosses bearings from several places into a position.

Set up

1. Add a multi-lane Device or an Array.
2. Add Direction finder. Set Geometry and Elements to match your antennas: a circle with a radius, a line with a spacing, or explicit positions.
3. Wire every lane to the matching input. All must come from one source.
4. Set Offset and Bandwidth to cover the signal.
5. Calibrate.
6. Wire GPS position for the map and triangulation.

The compass

The compass shows the response, the chosen bearing, and the confidence. 0° is north, clockwise. The strip below shows calibration per lane. Phase unknown hides bearings: check the clock wiring and the calibration reference.

Listen in one direction

Wire beam to a channel. Follow bearing points the beam at the current estimate. Fixed azimuth holds a direction.

Triangulate

1. Add Triangulation and wire each finder's events to it.
2. Give each finder its own position, from GPS or fixed coordinates.

It shows the estimate, its error ellipse, the age of each bearing, and where to go next. For a long thin ellipse it suggests moving across the bearing. Once the estimate settles, it suggests driving towards it. Clear starts over.

Wire finder or Triangulation events to a Map to see bearing rays, the estimate, and the next waypoint. The first settled fix emits an event that Event output can forward by webhook, MQTT, or Matrix. On a phone, use the DF drive mission in field mode.