A.K. Ermakov1

1 SUAI (St. Petersburg, Russia)

The problem of measuring the angular coordinates of low-flying radar targets has been known for a long time [1, 2] and is still relevant and unresolved, which is confirmed by a large number of articles that propose methods and algorithms to improve the accuracy of measuring angular coordinates, demonstrate the development of aerial objects capable of flying at low and ultra-low altitude [3, 4]. Confirmation of relevance can be seen from the recent situation [5, 6], the reason for which is the flight of helicopters at low altitude. The paper proposes a method for accounting for shading for a mathematical model of a signal reflected from a low-flying radar target and a method for forming a two-dimensional sea surface, which reduces the amount of calculations. The result of the analysis of sequential algorithms showed the lack of direction resolution, which is eliminated by the long signal accumulation time, which can be critical at high object speed. The change in frequency from pulse to pulse shortened the accumulation time, since the change in the nature of reflection affected the rate of change in the phase difference. The results of the study can be applied in the development of algorithms for measuring the angular coordinates of low-flying radar targets and their semi-natural testing.

Ermakov A.K. Evaluation of sequential algorithms for solving the problem of measuring the angular coordinates of low-flying radar targets. Radiotekhnika. 2023. V. 87. № 6. P. 76−82. DOI: https://doi.org/10.18127/j00338486-202306-09 (In Russian)

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