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International monitoring

Article 16 of the Radio Regulations (RR) contains the provisions related to the International Monitoring System (IMS). The IMS comprises monitoring stations and centralizing offices voluntarily designated by administrations. 
Provision No. 3.14 of the RR stipulates that: “to ensure compliance with these Regulations, administrations shall arrange for frequent checks to be made of the emissions of stations under their jurisdiction. For this purpose, they shall use the means indicated in Article 16, if required…”.
ITU Members shall cooperate in order to continue the development of the IMS in accordance with ITU-R Resolution 23-2 (2012) "Extension of the International Monitoring System to a worldwide scale".

Handbook on Spectrum Monitoring developed by ITU-R WP1C is available for online access free of charge for TIES users. 

List of International Monitoring Stations (List VIII)

​List VIII contains particulars of monitoring stations participating in international monitoring, together with the addresses of the centralizing offices. It includes information about the measurements that each monitoring station is able to perform. More...

Monitoring Programme in bands between 2 850 kHz and 28 000 kHz

The objective of this monitoring programme is to identify stations whose emissions in bands between 2 850 kHz and 28 000 kHz are not in conformity with the RR and to provide administrations that do not have monitoring facilities with information for frequency management purposes.

​The Bureau prepares a publication containing spectrum monitoring information in the frequency bands between 2 850 kHz and 28 000 kHz submitted by administrations in accordance with BR Circular-letter CR/159 of 9 May 2001.

Each publication is divided in several data files each of which contains observations corresponding to defined periods. The list of publications is accessible through this page.

Monitoring Programme in band 406-406.1 MHz (Resolution 205)

The objective of this monitoring programme is to identify and locate unauthorized emissions in the band 406-406.1 MHz that cause harmful interference to the reception of satellite EPIRB signals of the COSPAS-SARSAT system.
The Administrations participating in this monitoring programme provide their reports to the Bureau in application of Resolution 205 (Rev. WRC-12). Upon receipt of the reports, the Radiocommunication Bureau immediately contacts the Administrations responsible for the area where the unauthorized transmitters are located, requesting them to take immediate action with a view to stopping the emissions.