Letter | Published:

Interpretation of Cosmic Noise Measurements at 3.8 Mc./s. from Satellite 1960 ηI

Naturevolume 191page480 (1961) | Download Citation

Subjects

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.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Molozzi, A. R., Franklin, C. A., and Tyas, J. P. I., Nature, 190, 616 (1961).

  2. 2

    Steiger, W. R., and Warwick, J. W., J. Geophys. Res., 66, 57 (1961).

Download references

Author information

Affiliations

  1. Defence Research Telecommunications Establishment, Ottawa

    • J. H. CHAPMAN
    •  & A. R. MOLOZZI

Authors

  1. Search for J. H. CHAPMAN in:

  2. Search for A. R. MOLOZZI in:

About this article

Publication history

Issue Date

DOI

https://doi.org/10.1038/191480a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.