A test for the solar cycle variability of ionospheric radio wave absorption by A_1 technique

Details A test for the solar cycle variability of ionospheric radio wave absorption by A_1 technique A test for the solar cycle variability of ionospheric radio wave absorption by A_1 technique

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996adspr..18..319n&link_type=abstract

Advances in Space Research, Volume 18, Issue 6, p. 319-322.

Computer Science

Scientific paper

The quiet time solar cycle variability of ionospheric radio wave absorption of 2.132 MHz at Delhi is compared with the absorption calculated by using the well known aeronomical (six-ion) and empirical (IRI-1990) models of electron density profiles and standard collision frequency distributions. It is found that the observed increase of absorption in solar cycle 21/22 is by a factor of 2.5 greater than values computed with IRI. These latter are almost satisfactory for low and moderate values of the 1-8 Angstroms solar X-ray flux. Absorption and X-ray flux are well correlated for low and moderate, not so for high flux values.

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