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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 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.

Update Reference Tables

It is important to update your Reference tables regularly!

Authorizations

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 1999-2022