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GSR 2023

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​ are used to define​ the target service area. The agreed set of 911 test points is used by the HF software to calculate field strength values at each test point within the required service area. 

The mention of the name of a geographical area on this map, as well as the tracing of borders, do not imply, on the part of ITU, any position with respect to the political status of such a geographical area, or official recognition of these borders. The map delineates the areas only for the purpose of radiocommunications in the relevant service.