"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 1, 2019

contents of issue      DOI  10.30898/1684-1719.2019.1.10    full text in Russian (pdf)  

Measurement of vibration of sea surface objects by radio sounding


V. M. Burdyugov, I. P. Shumeiko, M. I. Ozhiganova

1 Marine Hydrophysical Institute of RAS, Kapitanskaya str.2, Sevastopol 299011, Russia

2 Sevastopol State University, Universitetskaya str. 33, Sevastopol 299053, Russia 


The paper is received on January 15, 2019  


Abstract. The possibilities of determining the vibration amplitude of marine objects by controlling the nonlinear transformation of the microwave radio signal reflected from the vibrating surface are analyzed. It is shown that the signal has such a structure that allows you to determine the amplitude of vibration according to the ratios of the amplitudes of the first four harmonics of the reflected radio signal. In the framework of this method, the vibration amplitude is determined in units of the length of the probing radio wave. This allows measurements to be taken without any additional radar calibrations.

The principal disadvantage of this method is the limitation of the range of measured vibration amplitudes, which cannot exceed 0.3 times the length of the radio wave. Ambiguity occurs at larger values of vibration amplitude. The interaction of radio waves with the sea surface also reduces the maximum value of the measured vibration amplitudes. The sea surface is mobile and its contribution to the Doppler radar spectrum can be significant.

A new approach to determining the amplitude of vibration is proposed. It is based on two-frequency sensing of the vibrating surface. It is shown that within the framework of this approach the range of vibration determination can be extended several times. The conditions for determining the relationship between the wavelengths that provide continuity of the range of measured vibration amplitudes are obtained. The continuity conditions are obtained taking into account the interference created by the sea surface.

Key words: vibration, remote sensing, harmonics of the reflected signal, phase modulation index.


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For citation:

V. M. Burdyugov, I. P. Shumeiko, M. I. Ozhiganova. Measurement of vibration of sea surface objects by radio sounding. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 1. Available at http://jre.cplire.ru/jre/jan19/10/text.pdf

DOI  10.30898/1684-1719.2019.1.10