А.Yu. Schukin - Ph.D. (Eng.), Head of Laboratory, JSC «RPC «NIIDAR». E-mail: ashchukin@inbox.ru V.V. Kogan - Ph.D. (Eng.), Leading Research Scientist, JSC «RPC «NIIDAR». E-mail: vkogan@niidar.ru М.S. Kuznetsov - Engineer, JSC «RPC «NIIDAR». E-mail: mkuznecov@niidar.ru P.V. Krauz - Head of Laboratory, JSC «RPC «NIIDAR». E-mail: pavel.krauz@mail.ru

Decameter over-the-horizon radar occupies a special place among other radars. The main difficulties related to the definition of the precise location of the air vehicle because of that the measured signal delay from it is greater than the signal delay at propagation along the surface of the Earth and the air vehicle can be irradiated simultaneously by several beams which have passed in the ionosphere different ways, that is connected with reflection from the various ionosphere layers. Delay, which measured by the over-the-horizon radar for each version of the spread will be different, resulting in a few tracks from one air vehicle are receive - multimode tracks multiplication. This leads to difficulties in determining the current situation in the monitored area, and error in determining the coordinates of objects and elements of the movement. If in the over-the-horizon radar control zone exist air vehicles whose coordinates are known with much greater precision than the ac-curacy of determining the coordinates of the over-the-horizon radar, the latter can be considered as a reference. In this paper is consider the problem of determining the fact of multiplication over-the-horizon radar tracks of air vehicle and their identification with tracks obtained from external sources. Described method of space-time correlation allows determining the fact of multiplication over-the-horizon radar tracks of air vehicles. The results of applying the method to refining the coordinates of air vehicles, their classification, using this information to correct the ionosphere model used to adapt to the current ionosphere conditions to improve the quality of work over-the-horizon radar are shown.

 

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