HIGH TECH IN EARTH SPACE RESEARCH

Distribution of maximum levels of atmospheric radio noise in LF and MF ranges in the territory of the Earth

Varlamov O.V., Varlamov V.O.

The DRM digital broadcasting system allows the most economical servicing of sparsely populated and remote areas with a missing broadcast infrastructure. It is recommended by the ITU for use in frequency bands below 30 MHz and by the government order is deemed expedient for use in the Russian Federation.

A feature of digital broadcasting is the threshold reception. This requires more careful regional frequency planning than broadcasting systems with amplitude modulation.

Networks of digital broadcasting in the LF and MF bands should be planned for round-the-clock broadcasting throughout the year, taking into account seasonal factors. For the LF and MF bands, is especially important to take into account the maximum levels of atmospheric radio noise in the planned service areas. In rural areas, where, usually, passes the border of the service area, in these bands this type of radio noise is predominant over other types of radio noise - industrial and galactic. As a criterion of "comfortable listening" in the DRM system, correct decoding of audio content for at least 98% of the time is accepted. Accordingly, the maximum level of atmospheric radio noise should be taken as its value, exceeded within 2% of the time in the band of the DRM signal at each point of the service area. Was developed a procedure for transition from the graph-analytical method described in the ITU recommendation to the definition of this parameter to the software-computing one. Developed software product uses the modified code of the ITU program for calculating atmospheric radio noise and allows mapping with an arbitrary scale the distribution over the area of the field strength of atmospheric radio noise exceeded for 2% in a given bandwidth at the frequencies of the LF and MF bands. Examples of calculations are given in the 10 kHz DRM bandwidth in the LF bands - for the First ITU region, and MF - for the entire territory of the Earth. The analysis of the examples of calculations made it possible to determine the preferred frequencies and areas on which it is most expedient to use digital broadcasting of the DRM standard.

The subject of published articles on the nomenclature of specialties

2.2.15 Systems, networks and telecommunications (technical sciences)

2.3.1 System analysis, management and processing of information (technical sciences)

2.3.5 Mathematical and software of computing systems, complexes and computer networks (technical sciences)

2.3.6 Methods and information protection systems, information security (technical sciences)

2.5.13 Design, design and production of aircraft (technical sciences)

2.5.16 Dynamics, ballistics, the movement of aircraft (technical sciences)

Editorial board

Bobrowsky V.I.
(Ph.D., Associate Professor, Head of Department of "INTELTEH")

Borisov V.V.
(Ph.D., Professor, Actual Member of the Academy of Military Sciences, Professor, Department of Computer Science of MPEI)

Budko P.A.
(Ph.D., Professor, Department of Technical communication and automation in S.M. Budjonny Military Academy of the Signal Corps)

Budnikov S.A.
(Ph.D., associate professor, Actual Member of the Academy of Education Informatization, Head of the automated control systems Department in Russian Air Force Military Educational and Scientific Center “Air Force Academy named after Professor N.E. Zhukovsky and Y.A. Gagarin”)

Verhova G.V.
(Ph.D., Professor, Head of Department of Automation communication companies In the Bonch-Bruevich Saint Petersburg State University of Telecommunications)

Goncharevsky V.S.
(Ph.D., Professor, Honored Worker of Science and Technology of the Russian Federation, Professor of technologies and technical support and maintenance of the automated control systems in Military Space Academy of A.F. Mozhaysky)

Komashinskiy V.I.
(Ph.D., Professor, professor of processing and transmission discrete messages in the Bonch-Bruevich Saint Petersburg State University of Telecommunications)

Kirpanev A.V.
(Ph.D., Associate Professor, Head of JSC "Scientific Production Enterprise "Radar MMS")

Kurnosov V.I.
(Ph.D., Professor, Academician of Academy of Sciences of the Arctic, Academician of the International Academy of Informatization, International Academy of defense, security, law and order, corresponding member of the Academy of Natural Sciences, Senior Researcher" Open Joint Stock Company "Scientific Research Institute "Rubin")

Manuilov Y.S.
(Ph.D., Professor, Department of automated control systems space complexes in Military Space Academy of A.F. Mozhaysky)

Morozov A.V.
(Ph.D., Professor, Actual Member of the Academy of Military Sciences, Head of the Department of automated command and control systems in Military Аcademy of troops of antiaircraft defense)

Moshak N.N.
(Ph.D., Associate Professor, head of the department of "INTELTEH")

Prorok V.Y.
(Ph.D., Professor, professor of automatic control systems in Military Space Academy of A.F. Mozhaysky)

Semenov S.S.
(Ph.D., associate professor, professor of technical communication and automation in S.M. Budjonny Military Academy of the Signal Corps)

Sinicyn E.A.
(Ph.D., Professor, Head of the Research Department of JSC "The All-Russian research institute of radio equipment")

Shatrakov Y.G.
(Ph.D., Professor, Honored Worker of Science, Scientific Secretary of JSC "The All-Russian research institute of radio equipment")