ComBalSat -CBS

Utilization of the ITU Spectrum Management databases

Case Study “Utilization of the ITU Spectrum Management databases” introduces, describes and demonstrates available ITU Spectrum Management (SM) databases and software modules for their utilization. This Case Study proposes information for the students to assist developing customer software modules, using ITU databases and ITU dynamic link library (*.DLL).

ITU-BR databases are used in  processing of frequency assignment notices, including information about orbital locations of geostationary satellites, received by the administrations for the purpose of recording in the Master International Frequency Register (MIFR). The periodic compilation of frequency lists reflects the data recorded in the MIFR.

     Some of the publications of revised Radio Regulations, ITU-R Recommendations and Handbooks on radio spectrum management and radio spectrum usage are distributed in database format.

The Case Study includes  main file, annexes and 32 files in the same directory with extra information, linked to proper part of this file. The Case Study files types are from the following formats:










The main ITU-BR radiocommunication and SM databases.

 ITU Digital World Map (IDWM).

Terrestrial Radio communication Systems (TERRASYS).

Satellite Radio Systems (SRS).

 Satellite Antenna Diagrams (GIMS).

Radiocommunication Data Dictionary (RDD).

Planned Broadcasting Satellite Systems (RR App. 30/30A) – BSS_AP30.mdb.

Radio Regulation database.

Input data for planning digital broadcastings (RRC-06).

            Results of the digital broadcastings planning exercises (RRC-06).


ITU Digitized World Map -IDWM

2.2.1. The ITU Digitized World Map (IDWM) was developed to integrate necessary geographical, political, meteorological and technical data which depend on geographical coordinates of points, regions, areas, etc.

The IDWM consist of two parts:

IDWM Data Base;

IDWM Subroutine Library.

The IDWM Data Base includes the following data:

geographical data (coastlines, seas, islands, lakes);

political data (country borders and region boundaries);

meteorological data (rain climatic zones);

Technical data (ground conductivity areas, noise zones, allotment areas).

The ITU Digitized World Map delineates geographical areas and political borders for the application of the Radio Regulations to different radiocommunication services.


2.2.2. Contents the IDWM Subroutine Library files (32-bit):

IDWM32.LIB   (static library).

IDWM32D.DLL         (dynamic-link library).

IDWM32D.LIB          (import library containing information about exports in IDWM32D.DLL):

the example of usage of the IDWM (source of the test program);

The IDWM Data Base files.

GEOPNT1.BIN         coordinates file.

GEOIDX1.BIN          index file.

GEOCCD3.BIN - pre-calculated distances between countries.



The Radiocommunication Bureau's Terrestrial Analysis System (TeRaSys) is a computerized tool used by the Bureau to process the frequency assignment notices submitted by the Administrations. The system also maintains the Master International Frequency Register, as well as the frequency assignment Plans. This data is available in a number of formats, including CD-ROM. The data is thus readily available in the defined format for national use for enquiries or in a database. This database is published in electronic form àt regular intervals each two weeks as the circular BR-IFIC with information on notified and recorded assignments on CD ROM.

The international Frequency List (IFL) now is in the format developed for TeRaSys environment. The Terrestrial CD-ROM publication includes:


Frequency Plans;


Special Sections.

TerRaBase is the data base portion of TerRaSys.

TerRaBase contains all of the parameters for all of the terrestrial notices and assignments in the ITU’s Radiocommunication Bureau.  TerRaBase is divided into three main groups:




The LF (Low Frequency) band covers the range from 30 kHz (including 30 kHz) up to 300 kHz (excluding 300 kHz).

The MF (Medium Frequency) band covers the range from 300 kHz (including 300 kHz) up to 3,000 kHz (excluding 3,000 kHz).

The VHF (Very High Frequency) band covers the range from 30 MHz (including 30 MHz) up to 300 MHz (excluding 300 MHz)

The UHF (Ultra High Frequency) band covers the range from 300 MHz (including 300 MHz) up to 3,000 MHz (excluding 3,000 MHz),

The LF/MF section of TerRaBase contains broadcasting stations in the Low Frequency (LF) and Medium Frequency (MF) portion of the spectrum.

The FM/TV section of TerRaBase contains FM (VHF sound) and TV (television) broadcasting stations.

The FXM section of TerRaBase contains everything that is not in the LF/MF section nor in the FM/TV section of TerRaBase.

This includes Fixed, Mobile, Aeronautical, etc., as well as the common frequencies.