Radio direction-finding station

RDF stations (A, B) used for Radio triangulation

Radio direction-finding station is – according to article 1.91 of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR)^[1] – defined as «A radiodetermination station using radio direction-finding.»

Each radiodetermiantion station shall be classified by the radiocommunication service in which it operates permanently or temporarily. If this station operates in a safety-of-life service, it will be protected for Interferences.

See also

Main articles: Radio station and Radiocommunication service

Classification

In accordance with ITU Radio Regulations (article 1) this type of radio station might be classified as follows:
Radiodetermination station (article 1.86) of the radiodetermination service (article 1.40 )

• Radionavigation mobile station (article 1.87) of the radionavigation service (article 1.42)
• Radionavigation land station (article 1.88) of the radionavigation service
• Radiolocation mobile station (article 1.89) of the radiolocation service (article 1.48)
• Radiolocation land station (article 1.90) of the radiolocation service
• Radio direction-finding station
• Radiobeacon station (article 1.92) of the radionavigation service

Selection radio direction-finding stations

• 
  RDF lorry
  (British Post Office, 1927)
• 
  RDF antennas
  (Galeta Island)
• 
  B-17F RDF antenna (in the prominent teardrop housing under the nose)
• 
  ILS Localizer (providing horizontal guidance)
• 
  VORTAC (providing azimuth guidance)
• 
  RDF on 121.5 MHz (Aircraft emergency frequency)
• 
  Aereal 121.5/156.8 MHz (Emergency location beacon aircraft)
• 
  RDF station 410 kHz
• 
  Maritime RDF station (GT-302)
• 
  Maritime RDF station (Pelengator)

References / sources

1. ↑ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.91, definition: radio direction-finding station

• International Telecommunication Union (ITU)