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The Electric Field Instrument (EFI) for the TRACERS Mission. [PDF]
Space Sci RevBonnell JW +4 more
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The Auroral Oval—A Reevaluation
Reviews of Geophysics, 1973The auroral oval represents a region of auroral occurrence where particular spectral features have sufficient integrated intensity to exceed all‐sky camera thresholds. It has been argued that this is not a good representation of the characteristics of particle precipitation or of energy deposition.
R H Eather
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The morphology of the IQSY auroral oval: 2. Auroral alignments in and near the auroral oval
Journal of Geophysical Research, 1967The azimuths of extended auroral features have been measured on all-sky camera photographs from Barrow, Alaska (dp [dipole] 68°) and T-3 Ice Island (dp 78°) during the IQSY period 1964–1965. The arc alignments measured at Barrow during the IQSY period are parallel for all hours to the Barrow arc alignments during IGY.
W. J. Stringer, A. E. Belon
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Journal of Geophysical Research, 1970
The auroral spectrum was recorded at Byrd Station, Antarctica, during the austral winter of 1967. Hydrogen Balmer line radiation was detected throughout the 24-hour day, depending on magnetic activity. The radiation defines an oval of proton precipitation that, as viewed from the particular location, appears as an equatorward movement around noon ...
M. H. Rees, P. C. Benedict
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The auroral spectrum was recorded at Byrd Station, Antarctica, during the austral winter of 1967. Hydrogen Balmer line radiation was detected throughout the 24-hour day, depending on magnetic activity. The radiation defines an oval of proton precipitation that, as viewed from the particular location, appears as an equatorward movement around noon ...
M. H. Rees, P. C. Benedict
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Excitation and decay of the auroral oval
2023The aurora often appears as an approximately oval shape surrounding the magnetic poles, and is a visible manifestation of the intricate coupling between the Earth’s upper atmosphere and the near-Earth space environment. While the average size of the auroral oval increases with geomagnetic activity, the instantaneous shape and size of the aurora is ...
Anders Ohma +7 more
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On the continuity of the auroral oval
Journal of Geophysical Research, 1970The Flying Ionospheric Laboratory, a NKC-135 jet aircraft of the Air Force Cambridge Research Laboratories, made during the winter of 1969–1970 four flights which examined the continuity of the auroral oval. Two passed completely around the oval; two covered the afternoon-evening half of the oval.
Jurgen Buchau +2 more
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Auroral glow equatorward from the auroral oval
Geomagnetism and Aeronomy, 2012On the basis of observations for the IGY period (visoplots) it is shown, that during magnetic storms diffuse glow is detected at all latitudes between the lowest latitude of the visually observed auroral glow at the zenith and the auroral oval. The diffuse glow region spatially coincides with the region of soft electron precipitation extending ...
V. L. Zverev +2 more
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Auroral oval planetary energetics
Journal of Atmospheric and Terrestrial Physics, 1971Abstract The energy associated with a polar substorm is deduced from photographs of the aurora.
Ya.I. Feldstein, G.V. Starkov
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Journal of Geophysical Research, 1967
Akasofu et al. [1964] and Feldstein [1964] have directed attention to the fundamental importance of the ‘auroral oval’ for explaining the basic morphology of auroras. In this connection, it may be of interest to remember that the ‘auroral oval’ was discovered in 1882 by Carlheim-Gyllenskiold [1886], although he never called it that. During the First
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Akasofu et al. [1964] and Feldstein [1964] have directed attention to the fundamental importance of the ‘auroral oval’ for explaining the basic morphology of auroras. In this connection, it may be of interest to remember that the ‘auroral oval’ was discovered in 1882 by Carlheim-Gyllenskiold [1886], although he never called it that. During the First
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Dynamics of the postnoon auroral oval
Canadian Journal of Physics, 1986The morphology of the postnoon auroral oval (1300–1500 magnetic local time) as determined by ground-based optical observations with all-sky TV's and meridian scanners at Sachs Harbour, N.W.T., and Cape Parry, N.W.T., is described. Arcs associated with the "inverted-V" type of precipitation events, frequently observed with rocket and spacecraft ...
D. J. McEwen, F. Creutzberg
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