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Reference data

The HFBC reference data, maintained by the Bureau, are designed to assist broadcasters and administrations in the preparation of their HF broadcasting requirements and to provide a common code system. The use of common code system should facilitate coordination between administrations, broadcasters and other users of HF spectrum.

Reference tables

​HF Reference tables used for the preparation of requirement files. All files are in ASCII text format.

​admin.txt ​Administrations
​antenna.txt​Transmitting antennas
​authoris.txt​Authorized organizations
​broadcas.txt​Broadcasters
​ciraf.txt​Test points and corresponding CIRAF zones
​fmorg.txt​Frequency management organizations
​language.txt​Languages based on ISO-3
​rngfreq.txt​Frequency bands
​season.txt​Seasons
​site.txt​Transmitting sites
​sunspot.txt​Sunspot numbers

Transmitting antennas for HF broadcasting

  • A list including antenna codes and antenna definitions (Reference table antenna.txt), based on  Recommendation ITU-R BS. 705, is maintained by the Bureau.
  • Transmitting Antennas For HF Broadcasting - Document describing the most common antenna types and their parameters: Curtain antennas, Tropical antennas, Lo-periodic antennas, Rhombic antennas, Quadrant antennas, Cross-dipole antennas and Vertical Monopoles. 

CIRAF zones maps

​The CIRAF zones and quadrants are used specify the Target service area. The agreed set of 911 test points is used by the HF software to calculate strength values at each test point inside the required service area.

Update Reference Tables


It is important to update your Reference tables regularly!

Authorizations

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Authorizations for submitting HFBC requirements to ITU-R:

Requirements are to be submitted by administrations or organizations who are authorized by the administrations concerned to do so, such as broadcasters and frequency managers (Article 12.1).

Authorizations should be submitted to:

  • Radiocommunication Bureau
    Place des Nations, CH-1211 Geneva 20, Switzerland
  • Fax No. +4122 7305785
  • Email: brmail@itu.int

Ionospheric Propagation

 
Sun spot number 1999-2021

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