Trans-Equatorial Backscatter Observations of Magnetically Controlled Ionization


A ROTATING backscatter equipment operating at Brisbane on a frequency of 16 Mc./sec. with a highly directional aerial1 has been modified to record echoes with ranges up to 15,000 km. It is found that on 95 per cent of afternoons echoes are returned from a north-easterly direction with ranges of 6–12,000 km. Typical sequences are shown in Figs. 1 and 2, where the plot is one of range versus magnetic azimuth from Brisbane.

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  1. 1

    Thomas, J. A., and McNicol, R. W. E., Nature, 187, 398 (1960).

  2. 2

    Mitra, S. K., Nature, 158, 668 (1946).

  3. 3

    McNish, A. G., and Gautier, T. N., J. Geophys. Res., 54, 303 (1949).

  4. 4

    Martyn, D. F., Physics of the Ionosphere, 259 (Phys. Society, London 1955).

  5. 5

    Duncan, R. A., J. Atmos. Terr. Phys., 18, 89 (1960).

  6. 6

    Wright, J. W., J. Geophys. Res., 65, 185 (1960).

  7. 7

    Villard, Q. G., Stein, S., and Yeh, K. C., J. Geophys. Res., 62, No. 3, 399 (1957).

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THOMAS, J. Trans-Equatorial Backscatter Observations of Magnetically Controlled Ionization. Nature 191, 792 (1961).

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