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Determination of quality and information content parameters of complex radio-location images in multifrequency sounding of the earth surface

DOI 10.18127/j00338486-201811-05

Keywords:

A.V. Korennoy – Honored Scientist of RF, Dr.Sc.(Eng.), Professor, Department №122, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: korennoj@mail.ru
S.A. Lepeshkin – Ph.D.(Eng.), Deputy Head of Department №95, Mozhaysky Military Space Academy (Saint Petersburg)
E-mail: lepeshkins@mail.ru
E.A. Yashchenko – Lecturer, Department №121, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: egorka421.91@mail.ru
O.A. Mishukov – Post-graduate Student, Department №95, Mozhaysky Military Space Academy (Saint Petersburg)
E-mail: oleg_mish@mail.ru
A.A. Kozhevnikov – Post-graduate Student, Department №122, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: kozhevnikov_a_a@mail.ru


The active development of microelectronics, the improvement of ways of generating and digital signal processing enables to create systems for remote sensing of the Earth surface (RSES) which are able to solve the wide range of scientific and economic tasks. Functioning of the remote sensing systems is based on the methods of obtaining information about the Earth surface and the objects located on it. Electromagnetic waves of different spectral ranges are basically used as a physical carrier of information. Peculiarities of radiation, propagation and reflection of electromagnetic waves of different bands essentially cause the differences in information ca-pabilities of certain remote sensing systems. In modern systems, almost all the range of electromagnetic radiation is widely used, starting with gamma and X rays and finishing with low-frequency radiations. Depending on the wave range the RSES systems can be divided into two groups: the systems with optical wave range and the systems with radio frequency band of electromagnetic waves. Having assessed the features of images formed by different remote sensing systems, it is possible to conclude that the complex processing of the forming images enables to improve information content of remote sensing systems.
The aim of the work is to offer the method of evaluation of complex images, formed by remote sensing systems in various frequency ranges.
The proposed method involves the assessment of the quality and information content of complex images. To assess the quality of images, the error variance of radio-location images reconstruction in each frequency range is used, and the entropy of the half-tone image is used to estimate the information content. To test the methodology, simulation modeling of cooperative and separate processing of radar images for centimeter and decimeter bands was carried out, the results of which have provided the estimates of the quality and information content of images. The simulation results indicate the information content increase and estimate errors decrease for radio-location images generated with the help of cooperative processing, compared with estimates of the same radio-location images formed as a result of separate processing.

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May 29, 2020

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