ACP – WG F/30 – IP/02
Agenda Item 9
27/02/14
International Civil Aviation Organization
AERONAUTICAL COMMUNICATION PANEL (ACP)
30th MEETING OF WORKING GROUP F (ACP WG/F/30)
Pattaya, Thailand, 13 – 19 March 2014
Agenda Item 9:
Interference from non-aeronautical sources
RADIO INTERFERENCE IN MONGOLIA
(Presented by Mongolia)
SUMMARY
This information paper is to inform Working Group-F about the radio interference issues in
Mongolian aeronautical radio frequency usage.
1.
Introduction
1.1
Mongolia regulates the use, allocation and protection of the radio frequencies under
the Law of Radio frequency with the support of the Communications Regulatory Commission of
Mongolia.
1.2
Communications Regulatory Commission of Mongolia agrees on the allocation of
radio frequency with the International Civil Aviation Organization (ICAO) and the International
Telecommunication Union (ITU), and grants the certificate to use the radio frequency based on an
agreement. This agreement regulates the relationship between the frequency user and authorizer, and
also covers the issue of radio frequency protection.
2.
Discussion
2.1
Due to the large territory with scarcely populated areas throughout Mongolia, the use
of radio communication is increasing in urban and rural areas significantly. However, the regulation
and monitoring of radio frequency use are still unsatisfactory. Aeronautical radio frequency
interferences are increasing in the territory of Mongolia. The source of interference is varying
including, electric facility malfunction, Local FM stations and radio communications of mining
companies.
2.2
According to the investigation in the SHAND site interference, the local FM station
100.9 MHz frequency was the reason for interfering VHF RCAG station radio frequency. This FM
station’s facility did not meet the requirement of the Communications Regulatory Commission of
Mongolia.
ACP-WG F/30 – IP/02
Agenda Item 9
27/02/14
-2-
2.3
The local FM106.2 MHz station with 43m high antenna facility was causing
interference to Undurkhaan RCAG station’s radio frequency. Recently, CAAM discovered radio
frequency interference on Khentii 122 MHz sector of Area Control Centre 14 November 2013.
2.4
The source of interference was unknown, so CAAM shifted the frequency 122 MHz
to 127 MHz. Also there were situations like electric facilities causing interference to the RCAG VHF
in particular sites in Mongolia.
3.
Conclusion
3.1
Although CAAM and the Communications Regulatory Commission of Mongolia are
cooperating in order to reduce the issues of radio frequency interference, it is still being inadequate.
However, currently CAAM is working closely with the Communications Regulatory Commission of
Mongolia to make amendments to the current regulatory framework for the usage of radio frequencies
for non-aeronautical purposes in order to reduce frequency interference.
4.
4.1
Action by the meeting
The meeting is invited to note the information contained in this paper.
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