A.G. Vinogradov1,2, A.N. Teokharov2

1,2 “Academician A.L. Mints Radiotechnical Institut” JSC (Moscow, Russia)
1 A.M. Obukhov Institute of Atmospheric Physics of RAS (Moscow, Russia)
 

On the basis of the ray and mode representation, a radar model of appearance of a waveguide channel over the sea surface is described, which makes it possible to observe targets in the shadow region at large distances compared to a direct-action radar system. Necessary and sufficient conditions for the existence of a waveguide channel for VHF waves in the near-water tropospheric layer with certain electrical properties are presented. Estimates for the number of modes excited in the waveguide, as well as a limitation on the wavelength of the radio signal are given. It is concluded that further research is needed to use the described effect in applied developments.

Vinogradov A.G., Teokharov A.N. Estimation of coherence of the signal reflected from objects on Earth's surface in bistatic space SAR system. Science Intensive Technologies. 2022. V. 23. № 5. P. 49−57. DOI: https://doi.org/10.18127/j19998465-202205-07 (in Russian)

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