Abstract
The temporal variation of the ionospheric absorption of radio waves in the 1.5 to 6 MHz range with the solar zenith angle (χ) is usually written in the form cosn χ. Theoretically n = 1.5 for absorption occurring in a Chapman layer, although such a theory cannot strictly be applied to the D region. On a diurnal basis, this variation is largely obeyed with values of n ranging from 0.5 to 1.0 and possessing a certain latitude dependence1. There is, however, a delay in maximum absorption of approximately twenty minutes on local noon, due to the relaxation time of the D region2.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
We are sorry, but there is no personal subscription option available for your country.
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
References
Davies, K., Ionospheric Radio Propagation, 3, 148, Monograph 80 (National Bureau of Standards, Washington, 1965).
Nitzsche, P., Introduction to IQSY Absorption Data at Neustrelitz (National Committee on Geodesy and Geophysics, Berlin, 1967).
Wakai, N., Ouchi, C., Nemoto, C., Kogaku, T., and Echizenya, Y., J. Radio Res. Labs., 16, 1 (Tokyo, 1969).
Higashimura, M., Sinno, K., and Hirukawa, Y., J. Radio Res. Labs., 16, 139 (Tokyo, 1969).
Beynon, W. J. G., and Jones, E. S. O., Proc. Roy. Soc., A, 288, 558 (1965).
Groves, G. V., Seasonal and Latitudinal Models of Atmospheric Temperature, Pressure and Density, 25 to 110 km, Survey in Geophysics No. 218 (United States Air Force Office of Aerospace Research, 1970).
Skinner, N. J., and Wright, R. W., J. Atmos. Terr. Phys., 9, 103 (1956).
Skinner, N. J., and Wright, R. W., J. Atmos. Terr. Phys., 26, 1221 (1964).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
OWEN JONES, E., REES, R. Seasonal Anomaly in Ionospheric Radio Wave Absorption. Nature Physical Science 243, 112–113 (1973). https://doi.org/10.1038/physci243112b0
Received:
Issue Date:
DOI: https://doi.org/10.1038/physci243112b0