Direct measurement of conjugate photoelectrons and predawn 630 nm airglow

Details Direct measurement of conjugate photoelectrons and predawn 630 nm airglow Direct measurement of conjugate photoelectrons and predawn 630 nm airglow

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..211s&link_type=abstract

Planetary and Space Science, vol. 26, Mar. 1978, p. 211-217. Research supported by the National Research Council of Canada and

Computer Science

Sound

1

Airglow, Conjugate Points, Ionospheric Electron Density, Photoelectrons, Rocket Sounding, Energy Spectra, Photoelectric Emission, Sounding Rockets

Scientific paper

The paper describes a sounding rocket mission flown predawn January 17, 1976 for the purpose of directly measuring the behavior of the conjugate photoelectrons at magnetically low latitudes. Data were obtained by an electron energy analyzer, a 630-nm airglow photometer, and plasma probes for electron density and temperature, and the incoming flux of the photoelectrons was measured in the altitude range between 210 and 340 km. The differential flux at the top of the atmosphere was found to be (1.3 + or - 0.4) times 10 to the 11th power exp(-E(eV)/12) electron/sq m per sr per sec in the energy range 10 equal to or less than E equal to or less than 50 eV. The emission rate of the 630 nm airglow was observed between 90 and 360 km, and it is estimated that more than 65% of the emission could be produced by direct impact of the photoelectrons with atomic oxygen in the thermosphere between 200 and 360 km. The residual of the emission is ascribed to the excitation of O(1D) through dissociative recombination.

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