Abstract
THE results of measurements of cosmic noise at 3.8 Mc./s. from the satellite 1960 η1 have been reported by Molozzi, Franklin and Tyas1. A puzzling feature was the variation in field-strength at different locations. These results have now been analysed, on the assumptions that variations in signal strength are due to three causes: (a) the variation of radiation resistance of the antenna due to the ionosphere surrounding of the satellite; (b) the restriction in angular aperture of the satellite antennæ due to the ionosphere; and (c) the variation of cosmic noise power over the sky. The results indicate that these are the most important factors affecting the cosmic radio signals.
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References
Molozzi, A. R., Franklin, C. A., and Tyas, J. P. I., Nature, 190, 616 (1961).
Steiger, W. R., and Warwick, J. W., J. Geophys. Res., 66, 57 (1961).
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CHAPMAN, J., MOLOZZI, A. Interpretation of Cosmic Noise Measurements at 3.8 Mc./s. from Satellite 1960 ηI. Nature 191, 480 (1961). https://doi.org/10.1038/191480a0
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DOI: https://doi.org/10.1038/191480a0
