scholarly journals A Statistical Study of the Spatial Extent of Relativistic Electron Precipitation With Polar Orbiting Environmental Satellites

2017 ◽  
Vol 122 (11) ◽  
pp. 11,274-11,284 ◽  
Author(s):  
Sapna Shekhar ◽  
Robyn Millan ◽  
David Smith
Keyword(s):  
Relativistic Electron ◽  
Statistical Study ◽  
Electron Precipitation ◽  
Spatial Extent

Relativistic Electron Precipitation Near Midnight: Drivers, Distribution, and Properties

2022 ◽  
Author(s):  
L. Capannolo ◽  
W. Li ◽  
R. Millan ◽  
D. Smith ◽  
N. Sivadas ◽  
...  
Keyword(s):  
Relativistic Electron ◽  
Electron Precipitation

scholarly journals Ground pulsation magnetometer observations conjugated with relativistic electron precipitation

2017 ◽  
Vol 122 (9) ◽  
pp. 9169-9182 ◽  
Author(s):  
A. G. Yahnin ◽  
T. A. Yahnina ◽  
T. Raita ◽  
J. Manninen
Keyword(s):  
Relativistic Electron ◽  
Electron Precipitation

Polar airglow and aurora

1991 ◽  
Vol 69 (8-9) ◽  
pp. 1055-1058 ◽  
Author(s):  
D. J. McEwen ◽  
D. A. Harrington
Keyword(s):  
Magnetic Field ◽  
Statistical Study ◽  
Geomagnetic Latitude ◽  
Great Variability ◽  
Electron Precipitation ◽  
Polar Cap ◽  
Winter Solstice ◽  
Latitude Range ◽  
Precipitation Occurrence ◽  
Airglow Emissions

A survey of night airglow emissions in the polar cap shows stable emission intensities during quiet periods through the winter solstice. Those affected by particle precipitation, OI λ5577 and λ6300, show great variability with solar activity and the state of the interplanetary magnetic field. A statistical study of electron-precipitation occurrence above 78° geomagnetic latitude shows events sufficient to result in observable enhancements in OI emission intensities in about 40% of the satellite passes in the magnetic latitude range from 79° to 83° and in about 15% of the passes for latitudes above 85°. This study provides the necessary background for dynamical studies of polar processes in the planned Canadian polar observatory.

scholarly journals Relativistic electron dropouts by pitch angle scattering in the geomagnetic tail

2006 ◽  
Vol 24 (11) ◽  
pp. 3151-3159 ◽  
Author(s):  
J. J. Lee ◽  
G. K. Parks ◽  
K. W. Min ◽  
M. P. McCarthy ◽  
E. S. Lee ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Magnetic Moment ◽  
Pitch Angle ◽  
Electron Flux ◽  
Electron Precipitation ◽  
Precipitation Event ◽  
Real Field ◽  
Geomagnetic Tail ◽  
Angle Scattering

Abstract. Relativistic electron dropout (RED) events are characterized by fast electron flux decrease at the geostationary orbit. It is known that the main loss process is non adiabatic and more effective for the high energy particles. RED events generally start to occur at midnight sector and propagate to noon sector and are correlated with magnetic field stretching. In this paper, we discuss this kind of event can be caused from pitch angle diffusion induced when the gyro radius of the electrons is comparable to the radius of curvature of the magnetic field and the magnetic moment is not conserved any more. While this process has been studied theoretically, the question is whether electron precipitation could be explained with this process for the real field configuration. This paper will show that this process can successfully explain the precipitation that occurred on 14 June 2004 observed by the low-altitude (680 km) polar orbiting Korean satellite, STSAT-1. In this precipitation event, the energy dispersion showed higher energy electron precipitation occurred at lower L values. This feature is a good indicator that precipitation was caused by the magnetic moment scattering in the geomagnetic tail. This interpretation is supported by the geosynchronous satellite GOES observations that showed significant magnetic field distortion occurred on the night side accompanying the electron flux depletion. Tsyganenko-01 model also shows the magnetic moment scattering could occur under the geomagnetic conditions existing at that time. We suggest the pitch angle scattering by field curvature violating the first adiabatic invariant as a possible candidate for loss mechanism of relativistic electrons in radiation belt.

Energy spectra in relativistic electron precipitation events

1972 ◽  
Vol 34 (12) ◽  
pp. 1977-1990 ◽  
Author(s):  
T.J. Rosenberg ◽  
L.J. Lanzerotti ◽  
D.K. Bailey ◽  
J.D. Pierson
Keyword(s):  
Relativistic Electron ◽  
Electron Precipitation ◽  
Energy Spectra ◽  
Precipitation Events
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