A.R. Ilchuk1, Yu.D. Kargashin2, V.I. Merkulov3, V.S. Chernov4

1,2 JSC «NPP «Istok» them. A.I. Shokin» (Fryazino, Moscow Region, Russia)

3,4 JSC Radio Engineering Corporation Vega (Moscow, Russia)

To control and monitor the radio-electronic situation, passive goniometer two-position systems (GDPS) of air-based radio monitoring can be used. A distinctive feature of the operation of these systems is the ability to measure only the angular position of radio emission sources (RES) and own coordinates of mobile receiving positions located on aircraft (LA). However, to ensure situational awareness of the state of the surrounding space, it is necessary to know the coordinates and parameters of the RES movement, in particular, the rectangular coordinates of the RES, the ranges to the RES, etc. That is why the task of estimating the coordinates of the RES is very relevant and various methods of estimating it using in as input data for indirect measurements of the rectangular coordinates of the RES, indirect estimates of the distance between the receiving position and the RES, and primary measured angular coordinates of the RES obtained at different receiving positions.

At the same time, a characteristic feature of the operation of the GDPS is that the errors in the location of radio emission sources depend on the size of the base and the position of the RES relative to the base. That is why the problem of optimizing the mutual arrangement of receiving positions and IRS is very relevant. To minimize positioning errors, various methods of surveillance trajectory control (CTS) have been developed. At the same time, it was taken into account that usually in GDPS one aircraft is the leader, and the second one provides information support.

One of the promising methods is the gradient method, which was created in relation to minimizing errors in determining the range to RES. The article analyzes this variant of the gradient method and the corresponding TUN algorithms, the implementation of which contributes to a significant increase in the accuracy of estimating the distance to RES in goniometric two-position air-based radio monitoring systems. Information about the results of experimental studies confirming the effectiveness of this method is given.

However, in practice, when constructing the trajectories of RES, as a rule, it is necessary to minimize errors in determining the rectangular coordinates of radio emission sources, which is carried out due to the trajectory control of the observation. To solve this problem, a corresponding version of the gradient method of trajectory control of observation in aviation goniometer two-position radio monitoring systems has been developed, which ensures the fastest possible reduction of errors in determining the rectangular coordinates of the location of RES during the flight of aircraft at each current moment of time. The developed variant of the gradient method of observation trajectory control makes it possible to remove the limitations associated with the need to use only indirect range measurements as input data for constructing RES trajectories, which allows to significantly expand the possibilities of practical application of the gradient method of observation trajectory control and known modifications of this method.

The given information about the algorithms that provide the implementation of two variants of the gradient method can be used when choosing rational methods for the trajectory control of information support aircraft for specific conditions of practical application, as well as when developing new methods of TUN.

Ilchuk A.R., Kargashin Yu.D., Merkulov V.I., Chernov V.S. Variants of the gradient method of trajectory control of observation in goniometric two-position air-based systems. Achievements of modern radioelectronics. 2022. V. 76. № 6. P. 13–25. DOI: https://doi.org/ 10.18127/j20700784-202206-02 [in Russian]

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