The attenuation of a specular component of HF signals from the vertical sounding of ionosphere

• Published in: Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Vol. 2; pp. 630 - 632 vol.2
• Main Authors: Denisenko, P.F., Kuleshov, G.I., Skazik, A.I.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2000
• Subjects: Attenuation; Hafnium; Ionosphere
• ISBN: 9780780363472; 0780363477
• DOI: 10.1109/MMET.2000.890518

The turbidity of the ionosphere for a passing electromagnetic radiation is described by the signal-to-noise ratio /spl beta//sup 2/=I/sub 0//<I/sub s/>, which is the ratio of specular I/sub 0/ to <I/sub s/> ensemble average scattered components of the wave field. The main method of /spl beta//sup 2/ estimation currently used is the approximation of experimentally obtained amplitude distribution laws of the waves reflected by the ionosphere with the aid of certain theoretical models. However, the same data, obtained from vertical F-region sounding, are described well enough by different models and lead to different /spl beta//sup 2/ values that differ by several orders (Denisenko et al. 1993). In this paper, a new method for /spl beta//sup 2/ value determination is proposed. No assumptions about the amplitude distribution law of the waves reflected by the ionosphere are required. This method leads to a correct estimation of the attenuation L/sub s/ of specular component of the wave field, coupled with /spl beta//sup 2/ by L/sub s/=ln((1+/spl beta//sup 2/)//spl beta//sup 2/).