Computer Science – Sound
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.6519h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 1, 1990, p. 6519-6532.
Computer Science
Sound
7
Beam Injection, Electron Beams, Image Processing, Rocket Sounding, Auroral Echoes, Geomagnetism, Magnetic Field Configurations, Plasma Drift, Thor Delta Launch Vehicle
Scientific paper
Artificial auroral streaks were detected following two upward injections of energetic electrons (38 keV and 26 keV) from the Echo 4 rocket-borne electron accelerator. Newly developed image processing techniques are used to detect and describe the streaks. It is found that the potential of the payload remained below 1 kV during 45 mA injections at an altitude of 210 km. The echo streaks show little dispersion in time or space, suggesting that the portion of the beam returning to the northern hemisphere loss cone remained collimated and nearly monoenergetic. There was, however, a 70 percent loss in the return flux. The causes of this loss are discussed.
Baldridge James
Hallinan Thomas J.
Malcolm Perry
Stenbaek-Nielsen Hans C.
Winckler John
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