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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
ciraf.txt​Test points and corresponding CIRAF zones
fmorg.txt​Frequency management organizations
language.txt​Languages based on ISO-3
rngfreq.txt​Frequency bands
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.