Results 61 to 70 of about 101 (79)
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Ionospheric structure from oblique‐backscatter soundings
Radio Science, 1973Oblique ionograms are made monostatically by using an HF sounder to record the delay times of echoes from known ground targets as a function of operating frequency. Cooperative sources, such as repeaters, or distinctive terrain features, such as cities, serve effectively as known ground targets.
Roy P. Basler, Thomas D. Scott
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Automatic processing and interpretation of backscatter ionosphere sounding ionograms
SPIE Proceedings, 2016We present techniques and algorithms for processing and interpretation of backscatter ionosphere sounding ionograms received on chirp ionosonde. The processing of experimental ionograms is carried out on the basis of basic data filtration with the subsequent compression by method of the cellular automaton.
S. N. Ponomarchuk +4 more
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The determination of ionosphere parameters on the base of backscatter sounding data
23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2017The results of operative diagnostics for ionosphere on the base of backscatter sounding received via chirp ionosonde are presented. The results of identification for registered signals and creation of tracks are basic data for determination of maximum usable frequencies and distant-frequency characteristics of one-hop mode 1F2 for oblique propagation ...
Maksim Penzin +3 more
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The investigation of signal shape for backscatter ionosphere sounding by continuous chirp signal
26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020The results of signal shape study for backscatter ionosphere sounding (BS) depending on conditions of radio waves propagation and electric properties of earth surface are given. The experimental BS data obtained in different seasons of the year on the basis of multifunctional chirp ionosonde developed in ISTP SB RAS were analyzed.
Sergey N. Ponomarchuk +2 more
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The research of backscatter ionosphere sounding features on the base of chirp ionosonde
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017We present the results of researches for backscatter ionosphere sounding (BS) on the basis of multipurpose chirp ionosonde developed in ISTP SB RAS. Points of transmitter (52.8°N, 103.3°E) and receiver (51.8°N, 103Έ) are located near the city of Irkutsk.
S. N. Ponomarchuk +2 more
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Izvestiya vysshikh uchebnykh zavedenii. Radiofizika, 2021
The data of experiments on the oblique backscatter sounding of the heated ionospheric volume above the Sura facility on a short Kazan—Vasilsursk—Kazan path, when the Cyclone-GPS ionosonde was operated in the ionogram recording regime in the frequency range 1–7 MHz with a step of about 20 kHz are compared with the results of ray-tracing calculations for
N.A. Pogorelko +3 more
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The data of experiments on the oblique backscatter sounding of the heated ionospheric volume above the Sura facility on a short Kazan—Vasilsursk—Kazan path, when the Cyclone-GPS ionosonde was operated in the ionogram recording regime in the frequency range 1–7 MHz with a step of about 20 kHz are compared with the results of ray-tracing calculations for
N.A. Pogorelko +3 more
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Backscatter Sounding During Ionospheric Storms
1961Abstract : The results of the ionospheric sounding by ground backscatter carried out at Torrechiaruccia (S. Marinella, Roma), during some severe ionospheric storms from August 1957 to February 1961, are briefly discussed. The advantages of the backscatter sounding to study the morphology of an ionospheric storm over a large area are put in evidence ...
P. Dominici, I. Ranzi
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26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020
The methods for determining and correction of ionosphere parameters by real-time data of vertical and backscatter data sounding (VS and BS) by continuous chirp signal are presented. The input data are forecast ionosphere parameters and processing and interpretation results for VS and BS ionograms: VS height-frequency characteristic (HFC) and the ...
Sergey N. Ponomarchuk +6 more
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The methods for determining and correction of ionosphere parameters by real-time data of vertical and backscatter data sounding (VS and BS) by continuous chirp signal are presented. The input data are forecast ionosphere parameters and processing and interpretation results for VS and BS ionograms: VS height-frequency characteristic (HFC) and the ...
Sergey N. Ponomarchuk +6 more
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Advances in Space Research, 2018
Abstract An upgrade of Wuhan Ionospheric Backscattering Sounding System (WIOBSS) was developed in 2015. Based on the Universal Serial Bus (USB), and a high performance FPGA, the newly designed WIOBSS has a completely digital structure, which makes it portable and flexible.
Jin Wang +3 more
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Abstract An upgrade of Wuhan Ionospheric Backscattering Sounding System (WIOBSS) was developed in 2015. Based on the Universal Serial Bus (USB), and a high performance FPGA, the newly designed WIOBSS has a completely digital structure, which makes it portable and flexible.
Jin Wang +3 more
openaire +1 more source