Wednesday September 10th @ 8PM
Fox Hunting
Key Principles
Signal Strength Indication (SSI): As you move closer to a transmitter, the signal strength typically increases. However, terrain, obstacles, and reflections can cause inconsistent readings.
Directional Reception: Directional antennas receive signals more strongly from one direction than others, allowing you to determine the bearing to a transmitter.
Polarization: Radio waves have electrical and magnetic components that oscillate perpendicular to the direction of travel. Matching your antenna’s polarization to the transmitter’s improves reception.
Multipath Propagation: Signals can reflect off buildings, hills, water bodies, and other objects, creating multiple paths from transmitter to receiver, which can cause false bearings.
Signal Attenuation: Radio waves naturally decrease in strength with distance (inverse square law), but obstacles cause additional attenuation.
Triangulation Technique
The most fundamental RDF method involves taking bearings from multiple locations and triangulating the transmitter’s position where these bearing lines intersect. The accuracy improves with:
More measurement points
Greater angular separation between measurements
Careful antenna handling to minimize body effects
Awareness of potential reflections causing false bearings
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