Abstract
A PRELIMINARY study of knee-whistlers observed in the late morning of a quiet day, July 26, 1967, 1206–1236 UT (Kp = 2–), by means of a wide-band (0.5 to 11 kHz) VLF goniometer receiver at Halley Bay (333.4° E of N, 75.52° S, generalized invariant latitude at 100 km: Λ′ = 61.02°) has revealed the existence of marked longitudinal variation (∼3: 1) in electron tube content on an L-shell (L ≃4.7–4.8) just outside the plasmapause.
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References
Angerami, J. J., and Carpenter, D. L., J. Geophys. Res., 71, 711 (1966).
Kilfoyle, B. P., and Jacka, F., Nature, 220, 773 (1968).
Carpenter, D. L., Radio Sci., 3, 719 (1968).
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BULLOUGH, K., SAGREDO, J. Longitudinal Structure in the Plasmapause: VLF Goniometer Observations of Knee-whistlers. Nature 225, 1038–1039 (1970). https://doi.org/10.1038/2251038a0
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DOI: https://doi.org/10.1038/2251038a0
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