Eclipse-related measurements of middle-atmosphere electrical parameters

Details Eclipse-related measurements of middle-atmosphere electrical parameters Eclipse-related measurements of middle-atmosphere electrical parameters

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jatp...45..515m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 45, July 1983, p. 515-525.

Computer Science

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Auroral Ionization, Electrical Resistivity, Ionic Mobility, Ionospheric Ion Density, Middle Atmosphere, Solar Eclipses, Rocket Sounding, Solar Activity Effects

Scientific paper

Measurements of electrical conductivity and its constituent parameters, charge density and ion mobility, are presented for the solar eclipse rocket campaign conducted at Red Lake, Ontario, Canada. Three parachute-borne probes (two Gerdien condensers and a blunt probe) were flown during the eclipse which occurred on 26 February 1979. Additional payloads launched at other times provided important supplemental background measurements. The entire launch series occurred during aurorally active conditions, as indicated by the probe measurements. Specifically, positive conductivity enhancements above 45 km demonstrate the dominance of auroral ionization as a source for positive ions in the region. Such effects evidenced during the eclipse make it difficult to determine the extent to which the decrease in positive conductivity above 60 km is eclipse-related. The negative conductivity component associated with free electrons displays solar dependence both during the eclipse and for the other measurement periods. In spite of the aurorally active conditions, rapid electron loss was observed during totality, thus indicating the importance of non-ionizing solar effects on electrons in the region.

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