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  • Other Sources  (2)
  • GEOPHYSICS  (2)
  • Electronics and Electrical Engineering
  • 1975-1979  (2)
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  • Other Sources  (2)
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  • 1
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    Unknown
    A comparison between radio meteor and airglow winds (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A comparison between the winds near an altitude of 97 kilometers has been made from observations of the 17,924-K (5577-A) O I emission line at Fritz Peak Observatory (39.8 deg N, 195.5 deg W) and with a meteor radar facility at Atlanta (34 deg N, 84 deg W), from August 1974 to November 1975. Since the optical emission measurements are made only at night, the nighttime meteor radar measurements have been used, weighted by an airglow emission-rate profile. The results show general agreement in both the zonal and meridional wind vectors, but with the variations in the amplitude of the meridional winds at the northernmost station (Fritz Peak Observatory) larger than those at Atlanta. This is a result of the smoothing inherent in producing the meteor winds.
    Keywords: GEOPHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Simultaneous observations of the proton ring current and stable auroral red arcs (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Explorer 45 observed the equatorial proton ring current in the plasmapause region and Fritz Peak Observatory observed stable auroral red (SAR) arcs on Dec. 17, 1971 during a geomagnetic storm. An estimate of energy lost from the ring current was obtained by using Explorer 45 observations of pitch angle distribution transitions which are probably due to pitch angle diffusion-driven resonant interactions with ion cyclotron waves. Estimates of the equatorial loss rate yield values greater than the required SAR arc energy input rate, and the location of the peaks in these loss rates agrees with the observed location of the arcs. It is thus concluded that this energy loss is sufficient to sustain the SAR arcs.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 81; Feb. 1
    Format: text
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    NASA TECHNICAL REPORTS
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