Radiophysical Investigations and Modeling of Ionospheric Processes Generated by Sources of Various Nature. 2. Processes in a Modified Ionosphere. Signal Parameter Variations. Disturbance Simulation

Гармаш, К. П.; Gokov, A. M.; Kostrov, L. S.; Rozumenko, V. T.; Tyrnov, O. F.; Fedorenko, Yu. P.; Tsymbal, A. M.; Черногор, Л. Ф.

doi:10.1615/telecomradeng.v53.i6.10

Cited by 14 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Oblique‐incidence sounding has been employed for studying dynamic processes successfully and for a sufficiently long time (Blagoveshchenskaya et al, ; Chernogor et al, ; Garmash et al, ; Garmash et al, ). To continuously monitor dynamic processes occurring in the ionosphere, specialists from V. N. Karazin Kharkiv National University, Ukraine, and the Harbin Engineering University, the PRC, have developed the multifrequency multipath radio system in the 10‐kHz to 30‐MHz band and placed it in operation in 2018.…”

Section: Introductionmentioning

confidence: 99%

“…To continuously monitor dynamic processes occurring in the ionosphere, specialists from V. N. Karazin Kharkiv National University, Ukraine, and the Harbin Engineering University, the PRC, have developed the multifrequency multipath radio system in the 10‐kHz to 30‐MHz band and placed it in operation in 2018. The designers have drawn on the experience of Garmash et al (, ) gained through the development of the radio systems at the Radio Physics Observatory, V. N. Karazin Kharkiv National University. Unlike Laštovička and Chum () and Kouba and Chum (), we use the longer radio paths, up to 2,000 km.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radio Monitoring of Dynamic Processes in the Ionosphere Over China During the Partial Solar Eclipse of 11 August 2018

et al. 2020

Self Cite

View full text Add to dashboard Cite

We briefly describe the multifrequency multiple‐path radio system and illustrate its observational capabilities by performing, as an example, the study of dynamic processes that occurred in the ionosphere over China during the partial solar eclipse on August 11 2018. This system, based on the software‐defined radio technology and capable of operating in the 10‐kHz to 30‐MHz band, has been developed jointly by Harbin Engineering University, the People's Republic of China, where it is located, and V. N. Karazin National University, Ukraine. The principle of the system operation is based on measurements of a Doppler shift of frequency. The implementation of Marple's algorithm for autoregression spectrum analysis has permitted an increase in a Doppler resolution down to 0.02 Hz and in a temporal resolution down to 7.5 s. The number of radio propagation paths and their orientation depend on the specifics of problems being solved. The interpretation of the eclipse effects is complicated by processes launched by the dusk terminator. The eclipse was associated with an increase in the number of rays, the generation of oscillation processes in the atmospheric gravity wave range of periods, and with a negative Doppler shift of frequency at first and a positive shift of smaller magnitude subsequently. The solar eclipse launched ~9–14% amplitude quasiperiodic oscillations in the electron density, while a maximum decrease of order 26% was observed over the Hailar–Harbin path in the ionospheric E region. The latter value does not virtually differ from theoretical estimates.

show abstract

Section: Introductionmentioning

confidence: 99%