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Effect of lunar atmospheric tide on the meson intensity at Kodaikanal

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Abstract

The lunar semidiurnal variation in the meson intensity at Kodaikanal has been determined by the Chapman-Miller method of analysis from bihourly records of the cosmic ray meson intensity registered by three-fold coincidences for two consecutive groups of data, each extending over a period of 18 months. The former period gives a result about two to three times the probable error and can be taken to be significant.

While the correlations between the solar diurnal variation of meson intensity and barometric pressure are high and negative, the corresponding correlations between the lunar semidiurnal variations of meson intensity and barometric pressure are positive. The results obtained at Kodaikanal agree with those of Duperier obtained at London.

But the latter period does not give any significant result outside the probable error. Hence further investigation has to be continued.

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Authors and Affiliations

  1. Physical Research Laboratory, Ahmedabad, India

    D. Venkatesan & T. S. G. Shastry

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  1. D. Venkatesan
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  2. T. S. G. Shastry
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Venkatesan, D., Shastry, T.S.G. Effect of lunar atmospheric tide on the meson intensity at Kodaikanal. Proc. Indian Acad. Sci. 42, 204–214 (1955). https://doi.org/10.1007/BF03053509

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  • DOI: https://doi.org/10.1007/BF03053509

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