On the First Results of Measurements of Geomagnetic Short-Period Field Variations in the Odesa Magnetic Anomaly Zone With a Second-Long Resolution

Sukharev, A. L.; Оrlyuk, М.І.; Ryabov, M. I.; Romenets, А.

doi:10.15407/rpra23.02.116

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Therefore, the location of the URAN-4 antenna array in the area of the Odessa regional magnetic anomaly provides a unique opportunity to study this relationship. Conducted studies of short-period geomagnetic variations in the Odessa magnetic anomaly, which fall within the range of periods of observed ionospheric variations on the URAN-4 antenna array, showed a significant difference in their properties and structure from the variations that were observed at the magnetic station in the Kiev region (Dymer), where the geomagnetic field close to normal [35,36,37,38]. In the summer of 2022, to conduct simultaneous observations of scintillations of radio sources and geomagnetic field disturbances, the LEMI-008 magnetometer of the Institute of Geophysics of the National Academy of Sciences of Ukraine was installed next to the URAN-4 antenna array.…”

Section: Interrelation With Geomagnetic Field Variations In the Odess...mentioning

confidence: 79%

About Research Programs at the Radio Telescope "Uran-4" Ira Nasu – Monitoring of Fluxes of Powerful Radio Sources, Study of the Sun's Supercorona, Observations of Solar Eclipse

Sukharev,

Ryabov,

Galanin

et al. 2023

OAP

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During 2020–2023, an initiative series of observation programs was carried out on a radiometer designed and manufactured by V.V. Galanin. Among them are observations of ionospheric scintillations of powerful radio sources Cas A, Cyg A, Vir A, Tau A, Per A, on the URAN-4 radio telescope (IRA NASU) at frequencies of 20 and 25 MHz. The observations were carried out at various states of Solar and geomagnetic activity and allow us to analyze the response of the ionosphere in the region of the Odessa Magnetic Anomaly to disturbing events. It was found that the radio source 3C 84 (Per A) is the least noisy at the location of the URAN-4 antenna and is well suited for studying the ionospheric response during magnetic storms. The recorded scintillation periods of the studied radio sources, on "calm" days, are in the range of 1-2 minutes. During magnetic storms, the periods of scintillations are reduced to 10-30 seconds. The paper considers the features of the response of scintillations of different radio sources to a magnetic storm, since they shine through different spatial regions of the ionosphere. Of particular interest are observations of the radio source Tau A (3C 144), which annually, in June, shines through the Solar Supercorona. Processing scans of such observations of the 3C 144 source shows an increase flux variations with an average "period" of about 5-10 seconds. Observations were also made to record the features of radio background variations during partial Solar eclipse. It is shown that during a Solar eclipse, the level of background radio noise increases significantly. At the same time, the background level on the next day after the eclipse was still quite high. A more detailed analysis of this effect is planned and, if possible, repeated observations.

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Section: Interrelation With Geomagnetic Field Variations In the Odess...mentioning

confidence: 79%

About Research Programs at the Radio Telescope "Uran-4" Ira Nasu – Monitoring of Fluxes of Powerful Radio Sources, Study of the Sun's Supercorona, Observations of Solar Eclipse

Sukharev,

Ryabov,

Galanin

et al. 2023

OAP

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“…Since the dome of the geomagnetic field extends to an altitude of about 90 km, into the ionosphere layer, where the variation (rapidly Figure 1: An example of the data table of the geomagnetic observatory "Odesa" variable) component of the geomagnetic field is formed, regional magnetic anomalies can affect the manifestation of the variability of the geomagnetic field. When processing long-term, long-term observational data, the influence of the magnetic anomaly on the geomagnetic activity of the Earth was revealed (Maksymchuk & Orlyuk, 2018;Ryabov et al, 2019;Sukharev et al, 2018;Orlyuk et al, 2015).…”

Section: Magnetic Anomaly Zonementioning

confidence: 99%

Comparative Analysis of Magnetic Storms in the Odessa Magnetic Anomaly Region With Planetary and Ionospheric Storms During the Monitoring Program at Rt "Uran-4" (1987 – 2010)

Sobitnyak,

Ryabov,

Orlyuk

et al. 2023

OAP

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This work is a continuation of the study of the response of the Odesa geomagnetic anomaly to the manifestations of solar and planetary geomagnetic activity. Not far from the territory of this magnetic anomaly there is the geomagnetic observatory "Odesa" and the decameter radio telescope "URAN-4" of the RI NASU. A catalogue of magnetic storms for the period 1987-1994 and 2000-2009 was compiled for the monitoring program of high-power space radio sources at RT "URAN-4" using the database of the geomagnetic observatory "Odesa". In this paper, a comparative analysis of the features of the manifestations of geomagnetic storms in the zone of the Odesa magnetic anomaly, planetary storms and ionospheric storms in the 22nd and 23rd cycles of solar activity is carried out. The main results are as follows. The magnetic anomaly amplifies the effects of regional manifestations of planetary magnetic storms. The number of different types of magnetic storms and the dynamics of their changes in the Odesa anomaly differ significantly in the 22nd and 23rd cycles of solar activity. Comparisons have shown that the duration of magnetic storms in the Odessa anomaly is longer than the duration of planetary magnetic and ionospheric storms. According to the data of the «URAN-4» radio telescope, geomagnetic storms form various manifestations of the effects of ionospheric flickers and flux changes for space radio sources depending on the time of their observations. For the region of the Odesa geomagnetic anomaly, such comprehensive studies have not been carried out before. The conducted studies will become an important basis for understanding the influence of magnetic anomalies on the dynamics of the ionosphere during periods of solar and geomagnetic activity.

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Analysis of the Magnetic Storms Catalog for Monitoring Radio Source Fluxe Data With the Uran-4 Radio Telescope in the Odesa Magnetic Anomaly Zone

Sobitnyak

Ryabov

Оrlyuk

et al. 2020

Radio phys. radio astron.

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Purpose: Compilation of a digital catalog of magnetic storms in the Odesa magnetic anomaly zone in order to find the reasons for possible changes in the radiation fluxes of cosmic radio sources, according to observations at the URAN-4 radio telescope. Design/methodology/approach: Since 1987 until now, the radio flux of powerful galactic and extragalactic radio sources has been monitored at the URAN-4 radio telescope of the Odesa Observatory of the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine. The monitoring program includes radio galaxies 3C274, 3C405 and supernova remnants 3C144, 3C461. Changes in the radio source flux level are determined by the ionosphere state due to the changes in space weather. At the “Odesa” geomagnetic observatory of the Institute of Geophysics of the National Academy of Sciences of Ukraine, the geomagnetic field measurements have been made since 1948. Simultaneously, the measurements of three elements of the geomagnetic field: horizontal component (H), vertical component (Z) and inclination (D), have been recorded. Findings: Using the “Odesa” geomagnetic observatory data, the digital catalog of magnetic storms was compiled for the measuring period of the powerful space radio source fluxes obtained with the URAN-4 radio telescope. For the magnetic storms monitored during the periods of 1987–1995 and 2000–2009, the date and time are shown for the beginning and the end of the magnetic storm, the magnetic storm duration, the amplitude of the three magnetic field elements, being H, Z, and D, and the magnetic storm type characteristic.The “Odesa” geomagnetic observatory is located near the magnetic anomaly zone. To find the distinctions in manifestations of the geomagnetic activity arisen owing to the magnetic anomaly existence, the geomagnetic disturbances recorded at the “Odesa” and “Moscow” (IZMIRAN, Russia) observatories were compared. It was shown that the total annual duration of the magnetic storms was longer in Odesa than in Moscow. This demonstrates some special role of the magnetic anomaly in the development of geomagnetic disturbances. Conclusions: The digital catalog of magnetic storms in the Odesa magnetic anomaly zone was compiled for the 1987–1995 and 2000–2009 periods. It is also planned to terminate working over the complete catalog of magnetic storms recorded at the “Odesa” observatory for the entire continuous period of monitoring space radio sources at the URAN-4 radio telescope in order to find the manifestations of geomagnetic disturbances impact upon the ionosphere state and changes of intensity in cosmic radio source fluxes. These studies are supplemented by the comparative analysis of the “Odesa” observatory geomagnetic data and the data from some other geomagnetic observatories. Key words: solar activity; monitoring variability of radio sources; magnetic storms; catalog of magnetic storms; magnetic anomaly

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On the First Results of Measurements of Geomagnetic Short-Period Field Variations in the Odesa Magnetic Anomaly Zone With a Second-Long Resolution

Cited by 3 publications

References 6 publications

About Research Programs at the Radio Telescope "Uran-4" Ira Nasu – Monitoring of Fluxes of Powerful Radio Sources, Study of the Sun's Supercorona, Observations of Solar Eclipse

About Research Programs at the Radio Telescope "Uran-4" Ira Nasu – Monitoring of Fluxes of Powerful Radio Sources, Study of the Sun's Supercorona, Observations of Solar Eclipse

Comparative Analysis of Magnetic Storms in the Odessa Magnetic Anomaly Region With Planetary and Ionospheric Storms During the Monitoring Program at Rt "Uran-4" (1987 – 2010)

Analysis of the Magnetic Storms Catalog for Monitoring Radio Source Fluxe Data With the Uran-4 Radio Telescope in the Odesa Magnetic Anomaly Zone

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