Abstract
Rocket (Underwood and Muney, 1967) and satellite observations of 2–8Å X-ray emissions indicate that the solar eclipse of May 20, 1966 occurred during a period in which the Sun was moderately active. The Goddard Space Flight Center conducted a series of small sounding rocket experiments to meàsure the ionospheric D-region electron density profile during successive stages of the eclipse. Compared to the uneclipsed profile, an order of magnitude reduction is observed in the D-region profile obtained near totality. From the electron density measurements together with the X-ray spectral data of Underwood and Muney it is concluded that on May 20, 1966, 2–8 Å X-rays were not the dominant source of D-region ionization below approximately 80 km.
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References
Bowling, T.S., K. Norman and A.P. Wilmore, D-region measurements during a solar eclipse. Planet. Space Sci. 15, 1035–1047 (1967).
Kantor, A.J. and A.E. Cole, Monthly atmospheric struc-ture surface to 80 km. J. appl. Met. 4, 228–247 (1965).
Kreplin, R.W., private communication (1967).
Landini, M., D. Russo and G.L. Tagliaferri, Solar eclipse of May 20, 1966 observed by the Solrad 8 Satellite in X-ray and ultra-violet bands. Nature, Lond. 211, 394 (1966).
Ohshio, M., R. Maeda and H. Sakagami, Height distribution of local photoionization efficiency. J. Radio Res. Labs Japan 13, 70, 245–577 (1966).
Phelps, A.V., Propagation constants for electromagnetic waves in weakly ionized air. J. appl. Phys. 31, 1723–1729 (1960)
Sen, H.K. and A.A. Wyller, On the generalization of the Appleton-Hartree magnetoinic formulas. J. Geophys. Res. 65, 3931–3950 (1960).
Underwood, J.H. and W.S. Muney, A glancing incidence solar telescope for the soft X-ray region. Solar Phys. 1, 129–144 (1967)
Underwood, J.H., private communication (1968)
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© 1970 Plenum Press, New York
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Kane, J.A. (1970). D-Region Electron Density Measurements during the Solar Eclipse of May 20,1966. In: Anastassiades, M. (eds) Solar Eclipses and the Ionosphere. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1839-2_12
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DOI: https://doi.org/10.1007/978-1-4684-1839-2_12
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-1841-5
Online ISBN: 978-1-4684-1839-2
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