Results 11 to 20 of about 6,222 (212)

Multipoint Observations of Equatorial Plasma Bubbles [PDF]

Journal of Geophysical Research: Space Physics, 2003
This paper compares evening sector measurements by the Jicamarca unattended long‐term studies of the ionosphere and atmosphere (JULIA) radar, the Ancon scintillation monitor, and plasma density sensors on Defense Meteorological Satellite Program (DMSP) satellites. During more than half of the 110 nights of JULIA operations in 1998 and 1999, backscatter
L. C. Gentile, J. S. Machuzak, C. E. Valladares, C. Y. Huang, W. J. Burke   +4 more
openaire   +2 more sources

Zonal velocity of the equatorial plasma bubbles over Kolhapur, India [PDF]

Annales Geophysicae, 2013
This paper presents the observations of zonal drift velocities of equatorial ionospheric plasma bubbles and their comparison with model values. These velocities are determined by nightglow OI 630.0 nm images.
D. P. Nade, A. K. Sharma, S. S. Nikte, P. T. Patil, R. N. Ghodpage, M. V. Rokade, S. Gurubaran, A. Taori, Y. Sahai   +8 more
doaj   +1 more source

Shrinking equatorial plasma bubbles [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractThe formation of equatorial plasma bubbles (EPBs) associated with spread F irregularities are fairly common phenomenon in the postsunset equatorial ionosphere. These bubbles grow as a result of eastward polarization electric field resulting in upward E × B drift over the dip equator.
V. L. Narayanan, S. Gurubaran, K. Shiokawa, K. Emperumal   +3 more
openaire   +1 more source

Ionospheric Turbulence and the Equatorial Plasma Density Irregularities: Scaling Features and RODI

Remote Sensing, 2021
In the framework of space weather, the understanding of the physical mechanisms responsible for the generation of ionospheric irregularities is particularly relevant for their effects on global positioning and communication systems.
Paola De Michelis, Giuseppe Consolini, Roberta Tozzi, Alessio Pignalberi, Michael Pezzopane, Igino Coco, Fabio Giannattasio, Maria Federica Marcucci   +7 more
doaj   +1 more source

Numerical simulation of the equatorial plasma bubble: the effect of seeding by the vertical winds and random background noise perturbations

Frontiers in Astronomy and Space Sciences, 2023
A wide variety of small-amplitude waves widely exist in the ionosphere and have significant effects on the evolution of equatorial plasma bubbles. In this paper, we simulated equatorial plasma bubbles (EPB) seeded by vertical neutral wind perturbations ...
Yunzhou Zhu, Qiong Tang, Qiong Tang, Tong Xu, Yi Liu, Chen Zhou, Zhongxin Deng, Yuqiang Zhang, Zhengyu Zhao, Fengsi Wei, Bin Xu, Shuji Sun   +11 more
doaj   +1 more source

Occurrence climatology of equatorial plasma bubbles derived using FormoSat-3 ∕ COSMIC GPS radio occultation data [PDF]

Annales Geophysicae, 2020
The Global Positioning System – Radio Occultation (GPS-RO) observations from FormoSat-3 ∕ COSMIC are used to comprehend the global distribution of equatorial plasma bubbles which are characterized by depletion regions of plasma in the F ...
A. Kepkar, A. Kepkar, C. Arras, J. Wickert, J. Wickert, H. Schuh, H. Schuh, M. Alizadeh, M. Alizadeh, L.-C. Tsai   +9 more
doaj   +1 more source

Semimonthly oscillation observed in the start times of equatorial plasma bubbles [PDF]

Annales Geophysicae, 2020
Using airglow data from an all-sky imager deployed at São João do Cariri (7.4∘ S, 36.5∘ W), the start times of equatorial plasma bubbles was studied in order to investigate the day-to-day variability of this phenomenon.
I. Paulino, A. R. Paulino, R. Y. C. Cueva, E. Agyei-Yeboah, R. A. Buriti, H. Takahashi, C. M. Wrasse, Â. M. Santos, A. Fragoso de Medeiros, I. S. Batista   +9 more
doaj   +1 more source

Global modeling of equatorial plasma bubbles [PDF]

Geophysical Research Letters, 2010
The NRL three‐dimensional ionospheric simulation code SAMI3 is used to model the onset and evolution of equatorial spread F (ESF). SAMI3 is a comprehensive ionosphere model that has been modified to self‐consistently solve for the global neutral wind driven dynamo electric field as well as the gravity driven electric field associated with plasma ...
J. D. Huba, G. Joyce
openaire   +1 more source

Why Do Equatorial Plasma Bubbles Bifurcate?

Journal of Geophysical Research: Space Physics, 2020
AbstractIonospheric plasma bubble observations using all‐sky airglow imagers in the OI 630‐nm emission show bifurcations with complex patterns. Bifurcation is the division of one channel of the plasma bubble into two that grow vertically in the magnetic equator. Several theories have been suggested to explain the bifurcation mechanism.
A. J. Carrasco, A. A. Pimenta, C. M. Wrasse, I. S. Batista, H. Takahashi   +4 more
openaire   +2 more sources

Midlatitude postsunset plasma bubbles observed over Europe during intense storms in April 2000 and 2001 [PDF]

, 2017
Plasma bubbles are prevalent features of the equatorial/low-latitude ionosphere which are seldom observed at middle and high latitudes. Understanding the influence of geomagnetic storms on plasma bubbles' migration to higher latitudes is an important ...
Habarulema, John Bosco, Hernández Pajares, Manuel, Katamzi Joseph, Zama Thobeka   +2 more
core   +2 more sources