O.I. Sauta1, E.P. Vinogradova2

1,2 St. Petersburg State University of Aerospace Instrumentation (SUAI) (St. Petersburg, Russia)

The problem of developing specialized correlation-extreme navigation systems for solving the problem of autonomous navigation is most acute against the background of an ever-increasing level of electromagnetic interference. The creation of adequate digital models of devices that are part of such systems allows us to analyze the performance of the proposed navigation methods and determine the main methods for their implementation. Objective – to develop a way to build a correlation-extreme navigation system that fits within the framework of the proposed classification model.

The mathematical model of the operation of an airborne low-altitude radio altimeter has been constructed, taking into account the features of the operation of a real device. The obtained simulation results correspond to the flight test data, while the error of the method under consideration does not exceed the permissible accuracy characteristics of the airborne radio altimeter. The research was carried out using the Mathcad package, which makes it easy to visualize the results of mathematical modeling.

The paper considers the method of construction, the principle of implementation and assessment of the correspondence to real data of a digital model for measuring a low-altitude radio altimeter, synthesized on the basis of the principles of geometric optics during the propagation of radio signals reflected from the underlying surface approximated by a digital relief matrix.

Sauta O.I., Vinogradova E.P. Low altitude radio altimeter measurement model for correlation-extreme navigation system. Achievements of modern radioelectronics. 2023. V. 77. № 8. P. 84–90. DOI: https://doi.org/10.18127/j20700784-202308-11 [in Russian]

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