Joint observations of a traveling ionospheric disturbance with the Paratunka OMTI camera and the Hokkaido HF radar

Koustov, A. V.; Нишитани, Н.; Ponomarenko, P. V.; Shiokawa, K.; Suzuki, Shin; Шевцов, Б. М.; MacDougall, J. W.

doi:10.5194/angeo-27-2399-2009

Cited by 8 publications

(6 citation statements)

References 17 publications

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“…In such conditions, concurrent observations with other instruments such as optical imagers and/or GPS TEC receivers are extremely useful. For example, Shiokawa et al (2008) and Koustov et al (2009) reported HOK GS echo bands moving equatorward in unison with optically identified MSTIDs. Finally, Oinats et al (2015) found nighttime mid-latitude MSTIDs are less frequent in winter; however, this may be due to a general decrease in GS occurrence because optical observations show clear MSTID maxima at solstices (Duly et al 2013 and references therein).…”

Section: Nighttime Mstids: Introductionmentioning

confidence: 99%

Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

Watanabe

Ruohoniemi

Lester

et al. 2019

Prog Earth Planet Sci

175

166

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The Super Dual Auroral Radar Network (SuperDARN) is a network of high-frequency (HF) radars located in the high-and mid-latitude regions of both hemispheres that is operated under international cooperation. The network was originally designed for monitoring the dynamics of the ionosphere and upper atmosphere in the high-latitude regions. However, over the last approximately 15 years, SuperDARN has expanded into the mid-latitude regions. With radar coverage that now extends continuously from auroral to sub-auroral and mid-latitudes, a wide variety of new scientific findings have been obtained. In this paper, the background of mid-latitude SuperDARN is presented at first. Then, the accomplishments made with mid-latitude SuperDARN radars are reviewed in five specified scientific and technical areas: convection, ionospheric irregularities, HF propagation analysis, ion-neutral interactions, and magnetohydrodynamic (MHD) waves. Finally, the present status of mid-latitude SuperDARN is updated and directions for future research are discussed.

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Section: Nighttime Mstids: Introductionmentioning

confidence: 99%

Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

Watanabe

Ruohoniemi

Lester

et al. 2019

Prog Earth Planet Sci

175

166

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“…Occurrence of nighttime medium‐scale traveling ionospheric disturbances (MSTIDs) is a common feature of the ionosphere over Japan [e.g., Yamamoto et al ., ; Shiokawa et al ., ; Saito et al ., ; Ogawa et al ., ]. MSTIDs have been observed with optical imagers [ Shiokawa et al ., ; Otsuka et al ., ], GPS receivers sensitive to the total electron content (TEC) in the ionosphere [ Saito et al ., ], HF radars [ Ishida et al ., ], and combination of these instruments [ Koustov et al ., ; Ogawa et al ., ; Suzuki et al ., ; Hayashi et al ., ; Ichihara et al ., ]. It has been established that nighttime MSTIDs over Japan propagate with the speeds in the range of several tens of meters per seconds to ~150 m/s predominantly in the SW direction.…”

Section: Introductionmentioning

confidence: 98%

“…SuperDARN observations of MSTIDs through ground scatter allowed estimating the magnitude of electron density perturbations in the ionosphere [ Bristow and Greenwald , ]. SuperDARN studies of MSTIDs using ground scatter at midlatitudes have been limited mostly to the Japanese sector [ Ishida et al ., ; Ogawa et al ., ; Koustov et al ., ; Ichihara et al ., ] where some differences with high‐latitude counterparts have been identified.…”

Section: Introductionmentioning

confidence: 99%

“…SuperDARN observations of MSTIDs through ground scatter allowed estimating the magnitude of electron density perturbations in the ionosphere [Bristow and Greenwald, 1995]. SuperDARN studies of MSTIDs using ground scatter at midlatitudes have been limited mostly to the Japanese sector [Ishida et al, 2008;Ogawa et al, 2009;Koustov et al, 2009;Ichihara et al, 2013] where some differences with high-latitude counterparts have been identified. the MSTID ionospheric region as their temporal periodicity is often shorter than the time scale of MSTID [e.g., Saito et al, 2006], and they occupy smaller space along HF radar beam direction (e.g., data in Ogawa et al [2009]).…”

Section: Introductionmentioning

confidence: 99%

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Hokkaido HF radar signatures of periodically reoccurring nighttime medium‐scale traveling ionospheric disturbances detected at short ranges

et al. 2014

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The Super Dual Auroral Radar Network Hokkaido HF radar often detects periodically reoccurring E region echoing regions propagating toward or away from it. In this work, we consider 117 of such events identified for [2008][2009][2010][2011][2012]. These are shown to occur at nighttime, preferentially during summer, although significant number for events was found for winter. Statistics for the local time of occurrence, magnitude of the speed and polarity of progressions, and temporal and spatial periodicities are presented. We show that the power of echoes is linearly related to their Doppler velocity which makes it possible to identify the events on both power and Doppler velocity plots. Other peculiar characteristics of echoes are discussed. The onset of events is associated with gravity waves propagation through the radar field of view.

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“…The second midlatitude SuperDARN radar has been operative in Hokkaido, Japan since December 2006. The radar was found to be a very powerful tool for monitoring storm time high‐speed subauroral flow [ Ebihara et al , 2008; Kataoka et al , 2007, 2009; Koustov et al , 2008] and various thermospheric waves [ Ishida et al , 2008; Ogawa et al , 2009; Suzuki et al , 2009; Koustov et al , 2009]. Since the radar field of view (FOV) well covers the possible source region of DUSE at the subauroral latitudes, the radar is suitable for estimating the latitudinal extent of DUSE.…”

Section: Introductionmentioning

confidence: 99%

Plasma irregularities in the duskside subauroral ionosphere as observed with midlatitude SuperDARN radar in Hokkaido, Japan

Hosokawa

Нишитани

2010

Radio Sci.

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[1] We revealed the spatial distribution of HF radar echoes in the subauroral region by conducting a statistical analysis of scattering occurrence from the midlatitude Super Dual Auroral Radar Network (SuperDARN) radar in Hokkaido, Japan. Consequently, Dusk Scatter Event (DUSE) was identified as a most prominent backscatter target in these latitudes. Past studies have intended to associate an appearance of DUSE with the density gradient at the poleward or sunward edges of the midlatitude trough. However, exact spatial collocation between the source region of DUSE and the midlatitude trough has not been revealed because the SuperDARN radars in the auroral region could not observe the whole part of DUSE due to a limitation of the field-of-view coverage. Thus, it has been unclear which of the density gradients associated with the midlatitude trough is responsible for generating DUSE. The data from the Hokkaido radar enabled us to estimate the lower-latitude boundary of DUSE as around 59°in AACGM magnetic latitude. In addition, by adding the data from the King Salmon radar in Alaska we derived a complete statistical distribution of DUSE. The latitudinal extent of DUSE is about 9°from 59°to 68°, which is approximately 1000 km. The statistical distribution of DUSE was compared with the model of the midlatitude trough. As a result, the source region of DUSE is closely colocated with the minimum of the trough, which suggests that the electron density gradient at the sunward edge of the trough is responsible for DUSE. This means that the location of the duskside sunward edge (i.e., local time extent) of the midlatitude trough can be monitored by using an appearance of DUSE as a proxy. The current statistical analysis also suggests that we can derive a spatial distribution of HF radar echoes from the midlatitudes to high latitudes by combining the data from the Hokkaido and King Salmon radars located in the Far Eastern area, which would be a very powerful diagnostic tool for investigating the global distribution of plasma irregularities.Citation: Hosokawa, K., and N. Nishitani (2010), Plasma irregularities in the duskside subauroral ionosphere as observed with midlatitude SuperDARN radar in Hokkaido, Japan, Radio Sci., 45, RS4003,

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Joint observations of a traveling ionospheric disturbance with the Paratunka OMTI camera and the Hokkaido HF radar

Cited by 8 publications

References 17 publications

Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

Hokkaido HF radar signatures of periodically reoccurring nighttime medium‐scale traveling ionospheric disturbances detected at short ranges

Plasma irregularities in the duskside subauroral ionosphere as observed with midlatitude SuperDARN radar in Hokkaido, Japan

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