Zonal velocity of the equatorial plasma bubbles over Kolhapur, India

Nade, D.P.; Sharma, Ashok; Nikte, S.S.; Patil, P. T.; Ghodpage, R. N.; Rokade, M. V.; Gurubaran, S.; Taori, A.; Sahai, Y.

doi:10.5194/angeo-31-2077-2013

Cited by 21 publications

(29 citation statements)

References 44 publications

(50 reference statements)

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“…Our results agreed with the some of the previous studies by [9] where drift velocity of EPBs gradually decrease with time. Although, the previous studied using different technique and location but obtained same results as well.…”

Section: Resultssupporting

confidence: 93%

“…High threshold value (0.06 TECU/ min) was taken into the attention to confirm the EPBs are truly present in the observational area. Then, the zonal drift velocity of EPBs can be calculated from its spatial displacement divided by time [9]. Zonal drift velocity was calculated for each EPBs from the onset highest ROTI values to the final highest ROTI values as can be seen from the keogram.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of zonal velocity of equatorial plasma bubbles (EPBs) by using GPS data

Sarudin¹,

Hamid²,

Abdullah

et al. 2017

J. Phys.: Conf. Ser.

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-The zonal velocity of equatorial plasma bubbles (EPBs) have been studied using various techniques in the past few years. However, the derivation of the zonal drift of EPBs using GPS ROTI have not been studied before. This study aims to investigate the zonal drifts of EPBs using GPS ROTI keogram. The Malaysia Real-Time Kinematic GNSS Network (MyRTKnet) which consists of 78 GPS receivers was used to study the occurrence of EPBs along 96°E -120°E longitude. The EPBs are detected from daily ROTI keogram that derived from east-west cross section of two dimension of ROTI maps at 5°N for every 5 minutes. On the night of 29 March 2011, 10 consecutive EPBs with periodic spacing between 50 km to 100 km were recorded by MyRTKnet. In this study, we obtained that highest drift velocity is about 277.7 m s-1 at 1400 UT which denoted by EPB 7 whereas the lowest drift velocity is EPB 4 with 27.8 m s-1 at 1600 UT. Besides, the EPBs are propagated towards the east from 200 km to 2800 km with average velocities is about 55.6 m s-1 to 138.9 m s-1.

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Section: Resultssupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Investigation of zonal velocity of equatorial plasma bubbles (EPBs) by using GPS data

Sarudin¹,

Hamid²,

Abdullah

et al. 2017

J. Phys.: Conf. Ser.

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show abstract

“…Although ground‐based airglow observations can be interrupted by local weather conditions, they contribute significantly to the understanding of EPB evolution and the associated physical processes. Ground‐based all‐sky airglow imagers have been previously used to investigate the morphological features of EPBs, including seasonal and daily variations of occurrence rates [ Sahai et al ., ; Makela et al ., ; Nade et al ., ; Sharma et al ., ], their zonal drift velocities [ Martinis et al ., ; Pimenta et al ., ; Yao and Makela , ; Pautet et al ., ; England and Immel , ; Nade et al ., ; Sharma et al ., ], poleward extensions or apex height changes [ Sahai et al ., , , ; Kelley et al ., ], the distance (or spacing) changes between adjacent EPB depletions in a group of EPBs [ Makela et al ., ], bifurcation and tilt of EPBs [ Weber et al ., ; Anderson and Mendillo , ; Mendillo and Tyler , ; Sinha and Raizada , ], and influences of geomagnetic and solar activities [ Sahai et al ., ; Yao and Makela , ]. All of these studies cited here, however, were made in North America, Brazil, and India regions.…”

Section: Introductionmentioning

confidence: 99%

A statistical analysis of equatorial plasma bubble structures based on an all‐sky airglow imager network in China

Sun

Wang

et al. 2016

JGR Space Physics

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This paper investigates the statistical features of equatorial plasma bubbles (EPBs) using airglow images from 2012 to 2014 from a ground‐based network of four imagers in the equatorial region of China. It is found that (1) EPBs mainly occur during 21:00–00:00 local time (LT) in equinoxes. There is an asymmetry in occurrence rates between March (June) and September equinoxes (December solstices). (2) Most EPBs occur in groups of two to six depletions. The distance between adjacent EPB depletions is ~100–700 km, and the average is 200–300 km. The zonal extension of an EPB group is usually less than 1500 km but can reach 3000 km. (3) EPBs usually have a maximum drift velocity near 100 m/s at 21:00–22:00 LT in 9.5° ± 1.5° geomagnetic latitude and then decrease to 50–70 m/s toward sunrise. (4) The averaged westward tilt angle of most EPBs (with respect to the geographic north‐south) increased from 5°–10° to 23°–30° with LT between 20:00 and 03:00 LT, then decreasing to 10°–20° toward sunrise. (5) When 90 < F10.7 < 140, the maximum magnetic latitudinal extension (PMLE) is usually lower than 15.0° (apex height ~725 km), but it can reach 23.0° (apex height ~1330 km) when F10.7 > 140. The maximum PMLE increases by 3.4°–5.5° when F10.7 changes from 90 to 190. (6) The EPB occurrence patterns and zonal drift velocities are significantly different from those at Kolhapur, India, which locates west to our stations by 20.0°–32.0° in longitude.

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“…The images in OI 630.0 nm, OI 557.7 nm, 840.0 nm, 846.0 nm, and OH Meinel bands at 720.0-910.0 nm and the transmission of background light in 857.0 nm are recorded with integration time of typically 120 s, 120 s, 06 s, 06 s, 90 s and 10 s, respectively. A more detailed discussion about this experimental setup is presented by Sharma et al (2012) and Nade et al (2013). Sharma et al (2014) presented the "averaging method" for image processing, flat fielding correction.…”

Section: The Nightglow Oi 6300 Nm Observationsmentioning

confidence: 99%

“…A succession of EPBs in each image and their time shifts lead to a zonal velocity versus local time relation for EPB. The details of method have been described by Nade et al (2013).…”

Section: Velocities Of Epbsmentioning

confidence: 99%

Geographical analysis of equatorial plasma bubbles by GPS and nightglow measurements

Nade¹,

Shetti²,

Sharma

et al. 2015

Advances in Space Research

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Zonal velocity of the equatorial plasma bubbles over Kolhapur, India

Cited by 21 publications

References 44 publications

Investigation of zonal velocity of equatorial plasma bubbles (EPBs) by using GPS data

Investigation of zonal velocity of equatorial plasma bubbles (EPBs) by using GPS data

A statistical analysis of equatorial plasma bubble structures based on an all‐sky airglow imager network in China

Geographical analysis of equatorial plasma bubbles by GPS and nightglow measurements

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