Precipitation of 400‐kev electrons in the auroral zone

Measurements of precipitating electrons with E > 400 kev were made with a solid-state detector from February 25 to March 10, 1965, aboard a near polar satellite at altitudes from 170 to 220 km. Auroral-zone data were taken (3.5 ≤ L ≤ 7.5) in two longitude intervals (170°E–225°E and 278°E–300°E). During every auroral-zone pass a flux of electrons, E > 400 kev, was observed ranging from 103 electrons/cm2 second to 105 electrons/cm2 second, while at other latitudes the maximum flux observed was less than 150 electrons/cm2 second. For the 278°–300°-longitude interval the conjugate points were mostly below 100 km. Fine temporal or spatial variations were observed during one pass; the flux changed by up to a factor of 5 in a few tenths of a second.

[1]  F. Mozer,et al.  PROPERTIES OF THE AURORAL-ZONE ELECTRON SOURCE DEDUCED FROM ELECTRON SPECTRUMS AND ANGULAR DISTRIBUTIONS , 1966 .

[2]  J. Blake,et al.  Precipitation of energetic electrons at middle latitudes , 1966 .

[3]  M. Walt,et al.  Rocket‐borne measurements of particle fluxes and auroral light , 1966 .

[4]  J. Burrows,et al.  LIFETIMES OF LOW-ENERGY ELECTRONS (E ~ 40 keV) IN THE OUTER RADIATION ZONE AT MAGNETICALLY QUIET TIMES , 1966 .

[5]  T. Rosenberg,et al.  Energy spectrum for auroral‐zone X rays: 1. Diurnal and type effects , 1966 .

[6]  R. Brown,et al.  Energy spectrum for auroral‐zone X rays: 2. Spectral variability and auroral absorption , 1966 .

[7]  J. Virginia Lincoln,et al.  Geomagnetic and solar data , 1966 .

[8]  T. Rosenberg,et al.  Spatial and temporal character of fast variations in auroral‐zone X rays , 1966 .

[9]  F. Mozer.  Rocket measurements of energetic particles: 2. Electron results , 1965 .

[10]  H. Hudson,et al.  Determinations of the auroral-zone X-ray spectrum , 1965 .

[11]  J. Blake,et al.  SPATIAL VARIATION OF THE INNER ZONE TRAPPED PROTON SPECTRUM , 1965 .

[12]  R. Brown,et al.  Balloon observations of auroral zone X rays in conjugate regions: 1. Slow time variations , 1965 .

[13]  R. Brown,et al.  Balloon observations of auroral zone X rays in conjugate regions: 2. Microbursts and pulsations , 1965 .

[14]  R. Sharp,et al.  Direct measurement of auroral electrons of low energies , 1965 .

[15]  K. Anderson,et al.  Balloon observations of X rays in the auroral zone: 3. High time resolution studies , 1964 .

[16]  E. E. Budzinski,et al.  Angular Distributions and Energy Spectra of Electrons Associated with Auroral Events , 1964 .

[17]  S. Freden,et al.  Precipitation of energetic electrons into the atmosphere , 1964 .

[18]  B. O'Brien.  High-latitude geophysical studies with satellite Injun 3: 3. Precipitation of electrons into the atmosphere , 1964 .

[19]  W. Macdonald,et al.  2. Particles with Mirroring Points at Low Altitude , 1962 .

[20]  G. Pizzella,et al.  The Morphology and Temporal Variations of the Van Allen Radiation Belt, October 1959 to December 1960 , 1962 .

[21]  S. D. Bloom,et al.  THE ELECTRON SPECTRUM FROM 80 TO 1258 kev OBSERVED ON DISCOVERER SATELLITES 29 AND 31 , 1962 .