Observation of short-wave radio signals reflected and scattered by the ionosphere and the earth's surface, at the test site of the Moscow State University

Turbulence, Atmosphere and Climate Dynamics

生态环境科学

Yu Belov, S.^1 ; Belova, I.N.^2

Physics Department, M.V. Lomonosov Moscow State University, 1 Leninskie gory, Moscow

119991, Russia^1

A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, 3 Pyzhevsky Lane, Moscow

119017, Russia^2

关键词: Comparative analysis;    Extract informations;    Moscow State University;    Quadrature components;    Remote diagnostics;    Subsurface structures;    Synchronous information;    Synchronous registration;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/231/1/012009/pdf
DOI  :  10.1088/1755-1315/231/1/012009

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The problem of remote diagnostics of a "rough" earth surface and dielectric subsurface structures in the shortwave radio wave band is considered. A new incoherent method for estimating the signal-to-noise parameter is proposed. The idea of the method for determining this parameter is that, by having synchronous information about a wave reflected from the ionosphere and about a wave reflected from the earth and the ionosphere (or having passed the ionosphere twice when probing from a satellite), it is possible to extract information about the scattering parameter. The paper presents the results of recording the quadrature components of the signal by means of the ground measuring complex of installation of coherent sounding in the short-wave range of radio waves at the test site of the Moscow State University (Moscow). A comparative analysis is performed and it is shown that according to the analytical (relative) accuracy of the definition of this parameter the new method is an order of magnitude larger than the widely used standard method. Analysis of the analytical errors in the estimation of this parameter allowed us to recommend a new method instead of the standard one. The software for synchronous registration of quadrature components of radio signals of various multiplicities in real time with the formation of a database of experimental data was developed, successfully tested and patented; one of the functions of the software is to protect the computer system from the powerful radiating pulse of the radio transmitter.