Observation and analysis of statistical characteristics of trans-ionospheric radio signals
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В работе проведен прием и регистрация трансионосферных навигационных сигналов с целью анализа параметров сигналов и определения характеристик среды распространения. С помощью двух профессиональных измерительных приемников производителей Septentrio и Novatel были получены большие наборы данных, при анализе которых было выявлено, что у каждого приемника имеются недостатки. В результате измерений был исследован типичный суточный ход полного электронного содержания ионосферы (ПЭС), также во время геомагнитной бури были зафиксированы скачки ПЭС. При исследовании ионосферных мерцаний были получены индексы флуктуаций амплитуды мерцаний S4 и фазы мерцаний σ_φ, и коэффициенты корреляции между аналогичным величинами для разных приемников. Получены и исследованы спектры флуктуаций фазы и амплитуды сигнала. Было выяснено, что в условиях поставленного эксперимента при анализе флуктуаций сигнала на двух частотах ионосферная составляющая флуктуаций в большинстве случаев была значительно слабее других факторов.
In the work, the reception and registration of transionospheric navigation signals was performed aiming an analysis of the signal parameters and determining characteristics of the propagation medium. The extensive data sets were obtained employing two professional measuring receivers produced by Septentrio and Novatel; analysis of data revealed that both receivers have some disadvantages. As a result of measurements, the typical daily course of the total electron content of the ionosphere (TEC) was investigated; during the geomagnetic storm some specific jumps of TEC were recorded. In the study of ionospheric scintillations, the scintillation indices of amplitude S4 and phase σφ were obtained, and the correlation coefficients between similar indices for different receivers were estimated. Spectra of phase and amplitude fluctuations were studied. Analysis of the signal fluctuations at the two frequencies revealed that under the conditions of the experiment, the ionospheric component of the fluctuations was, in most cases, much weaker than other factors.
In the work, the reception and registration of transionospheric navigation signals was performed aiming an analysis of the signal parameters and determining characteristics of the propagation medium. The extensive data sets were obtained employing two professional measuring receivers produced by Septentrio and Novatel; analysis of data revealed that both receivers have some disadvantages. As a result of measurements, the typical daily course of the total electron content of the ionosphere (TEC) was investigated; during the geomagnetic storm some specific jumps of TEC were recorded. In the study of ionospheric scintillations, the scintillation indices of amplitude S4 and phase σφ were obtained, and the correlation coefficients between similar indices for different receivers were estimated. Spectra of phase and amplitude fluctuations were studied. Analysis of the signal fluctuations at the two frequencies revealed that under the conditions of the experiment, the ionospheric component of the fluctuations was, in most cases, much weaker than other factors.