Multi‐Position Facility for HF Doppler Sounding of Ionospheric Inhomogeneities in Ukraine

Galushko, V. G.; Yampolski, Y. М.; Мишин, Е. В.; Kashcheyev, S. B.; Sopin, A. O.; Koloskov, A. V.; Lisachenko, V. N.; Reznychenko, A. I.

doi:10.1029/2021rs007303

Cited by 4 publications

(1 citation statement)

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“…Changes in the azimuthal directions of the ionospheric disturbances propagation and possible relation to the background wind have been reported earlier (e.g., Crowley et al., 1987; Fedorenko & Kryuchkov, 2013; He et al., 2004; MacDougall et al., 2009; Zalizovski et al., 2021), however, in most cases, the analyzed datasets were limited in time and seasons, making it impossible to see the entire climatology of the events. In fact, one of the main advantages of the GNSS methods is the ability to collect large amount of data, which are relatively straightforward to process with automated algorithms.…”

Section: Resultsmentioning

confidence: 76%

Occurrence and Characteristics of Traveling Ionospheric Disturbances in the Antarctic Peninsula Region

et al. 2022

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A statistical picture of the occurrence and characteristics of Traveling Ionospheric Disturbances (TIDs) over the Antarctic Peninsula is established using Global Navigation Satellite System Total Electron Content and High Frequency sounding observations. The measured parameters of the majority of the disturbances allow classifying them as medium scale TIDs (MSTIDs). Overall, the observed climatology of ionospheric disturbances in the Antarctic Peninsula region varies significantly with the season and makes it possible to differentiate two major types of the disturbances: winter daytime and summer nighttime, based on their occurrence periods and characteristics. During the Antarctic summer period, the disturbances are present mainly during the nighttime and morning hours, when the background plasma density is at maximum (due to Weddell Sea Anomaly). These disturbances predominantly propagate northwestward and their occurrence probability is well correlated with the sporadic E layer observations, suggesting that these are electrified MSTIDs. During the winter, the TID events are almost exclusively observed during the daytime. The propagation direction of the disturbances during the daytime shows a strong correlation with the background neutral wind direction in the thermosphere. A possible mechanism for this effect is wind filtering of the Atmospheric Gravity Waves originating in the troposphere, which indicates that their source is in the lower atmosphere. The periods of the TIDs also significantly differ between the seasons. Wintertime TIDs have noticeably shorter periods (10–50 min) than those observed during other parts of the year (30–140 min), which also likely reflects the fact that the two types of TIDs are generated by different physical mechanisms.

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