scholarly journals Studying the small-scale structure of a polarization jet during the April 20, 2018 geomagnetic storm

2021 ◽  
Vol 7 (1) ◽  
pp. 17-26
Author(s):  
Aleksandr Sinevich ◽  
Aleksandr Chernyshov ◽  
Dmitriy Chugunin ◽  
W. Miloch ◽  
Michael Mogilevsky
Keyword(s):  
Geomagnetic Storm ◽  
Sampling Rate ◽  
Scale Structure ◽  
Small Scale ◽  
Langmuir Probes ◽  
Plasma Parameters ◽  
Small Scale Structure ◽  
Measurement Results ◽  
Spatial Dimensions ◽  
Density Inhomogeneities

In this work, we study the small-scale structure of a polarization jet in the subauroral region during the April 20, 2018 geomagnetic storm. We report measurement results of plasma parameters inside the polarization jet with a maximum sampling rate of up to 1 kHz, obtained with Langmuir probes installed on the NorSat-1 microsatellite. The study establishes the presence of temperature and electron density inhomogeneities inside the polarization jet with spatial dimensions of tens to hundreds of meters. The previously known features of the polarization jet evolution have been confirmed. We have also found that the distribution of the electron temperature inside the jet forms two separate peaks as the geomagnetic activity develops during the storm.

scholarly journals Studying the small-scale structure of a polarization jet during the April 20, 2018 geomagnetic storm

2021 ◽  
Vol 7 (1) ◽  
pp. 21-33
Author(s):  
Aleksandr Sinevich ◽  
Aleksandr Chernyshov ◽  
Dmitriy Chugunin ◽  
W. Miloch ◽  
Michael Mogilevsky
Keyword(s):  
Geomagnetic Storm ◽  
Sampling Rate ◽  
Scale Structure ◽  
Small Scale ◽  
Langmuir Probes ◽  
Plasma Parameters ◽  
Small Scale Structure ◽  
Measurement Results ◽  
Spatial Dimensions ◽  
Density Inhomogeneities

In this work, we study the small-scale structure of a polarization jet in the subauroral region during the April 20, 2018 geomagnetic storm. We report measurement results of plasma parameters inside the polarization jet with a maximum sampling rate of up to 1 kHz, obtained with Langmuir probes installed on the NorSat-1 microsatellite. The study establishes the presence of temperature and electron density inhomogeneities inside the polarization jet with spatial dimensions of tens to hundreds of meters. The previously known features of the polarization jet evolution have been confirmed. We have also found that the distribution of the electron temperature inside the jet forms two separate peaks as the geomagnetic activity develops during the storm.

scholarly journals A Search for Very Compact Structure in 17 OH Masers

1988 ◽  
Vol 129 ◽  
pp. 255-256
Author(s):  
A. J. Kemball ◽  
P. J. Diamond ◽  
F. Mantovani
Keyword(s):  
Galactic Disk ◽  
Hii Regions ◽  
Scale Structure ◽  
Small Scale ◽  
Compact Structure ◽  
Small Scale Structure ◽  
Interstellar Scattering

The apparent spot sizes of OH masers appear to be significantly broadened when seen through the inner galaxy or large extents of the galactic disk (Burke 1968). Bowers et al (1980) found evidence of small-scale structure (≲ 50 mas) in OH sources at distances of less than 5 kpc but this was characteristically absent in very distant sources (≳ 8kpc) at galactic longitudes 1 ≲ 40°. This result is typically explained in terms of interstellar scattering (ISS) by intervening diffuse HII regions.

Analysis of the small-scale structure of turbulence on smooth and rough walls

2003 ◽  
Vol 15 (1) ◽  
pp. 35-46 ◽  
Author(s):  
D. Poggi ◽  
A. Porporato ◽  
L. Ridolfi
Keyword(s):  
Scale Structure ◽  
Small Scale ◽  
Small Scale Structure ◽  
Rough Walls

Small-scale structure of the Taylor–Green vortex

1983 ◽  
Vol 130 (-1) ◽  
pp. 411 ◽  
Author(s):  
Marc E. Brachet ◽  
Daniel I. Meiron ◽  
Steven A. Orszag ◽  
B. G. Nickel ◽  
Rudolf H. Morf ◽  
...  
Keyword(s):  
Scale Structure ◽  
Small Scale ◽  
Small Scale Structure
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