A.V. Belinsky1, A.A. Nogtev2, A.A. Alimov3, D.R. Serazhetdinov4

1–4 FSUE RFNC «All-Russian Research Institute of Experimental Physics» (Sarov, Russia)
1 1515niiis@rambler.ru, 2 anogtev@niiis.nnov.ru, 3 aalimov@niiis.nnov.ru, 4 serazhetdinovdin@gmail.com

To ensure high accuracy and reliability of navigation under various operational conditions, modern high-precision navigation systems of aircraft are built on the integration of inertial navigation with satellite navigation systems, radio altimetry, and methods of navigation by spatial geophysical field, including correlation-extremum approaches.

The implementation of the latter methods is carried out in correlation-extremum navigation systems (CENS), which serve to determine the position of aircraft in space by comparing a reference image formed in advance from source data (a reference relief elevation map, video images), with a current (measured) maps is carried that reach a global extremum upon complete alignment.

To solve the navigation problem for such systems, information areas of the terrain (correction areas) have to be first identified, over which the aircraft’s trajectory is planned to pass with a certain probability. These areas are characterized by the presence of object composition for performing navigation fixes, and by main statistical characteristics (root mean square values of relief height deviations, correlation radii).

In case where conditions arise that can cause changes in the aircraft’s course, the probability of the trajectory leading the aircraft to low-information correction areas increases, which can lead to a significant loss of accuracy and reliability in solving the navigation problem.

The aim of this work is to develop a search algorithm for finding relief clusters that are more informative compared to other areas of the underlying surface by scanning it using a multi-beam antenna-feeder system.

The results of mathematical modelling of the CENS operation with a multi-beam antenna-feeder system when moving over correction areas are presented, both with and without the developed algorithm for searching the most informative relief zones.

The developed algorithm can be used in CENS that include multi-beam antenna-feeder system for adaptive control of its beams. The algorithm can enhance the reliability and accuracy of navigational positioning in areas containing both informative and non-informative relief regions.

Belinsky A.V., Nogtev A.A., Alimov A.A., Serazhetdinov D.R. Algorithm for identifying informative areas of the underlying surface under conditions of multipath signal propagation for correlation-extremum navigation systems // Achievements of modern radioelectronics. 2026. V. 80. № 8. P. 26–34. DOI: https://doi.org/10.18127/j20700784-202608-04

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