Model for Assessing the Intelligence Security of Local Navigation System Elements

Relevance. The vulnerability of global positioning systems stimulates the deployment and practical operation of local radio navigation systems in order to solve specific navigation tasks for unmanned aerial systems. This approach is based on the successful operation of short-range navigation systems such as TACAN and VOR/DME. However, the use of unmanned aerial vehicles as platforms for unauthorized radio monitoring and jamming systems makes local radio navigation systems vulnerable to destructive interference. Therefore, it is necessary to develop a set of measures to assess the intelligence protection of radio navigation information lines and, in the future, to develop methods to improve their interference protection.

Objective: to create a mathematical model for researching and evaluating the intelligence protection of elements of local radio navigation systems based on the coincidence of impulse streams.

Methods: energy calculation methods for radio communication lines, probability theory, and formalization of signal search procedures based on pulse flow theory.

Results: a private model of the functioning of a local radio navigation system for servicing unmanned aircraft platforms has been developed; an analytical apparatus for a model of radio monitoring of radio source signals has been refined, taking into account the spatial, frequency and time coincidence of the antenna patterns of the search receiver and the radio navigation signal emitted in pulsed mode; dependences of the probability of electromagnetic availability of radio sources on the monitoring distance for different antenna pattern widths have been obtained. the search receiver; the procedures for searching for navigation signals in the form of a pulse stream are formalized; the dependences of the probability and time of coincidence of pulse streams characterizing the search procedures and the functioning of local radio navigation systems are calculated.

Practical significance: the results of the work can be used in the design of the deployment of local radio navigation systems, taking into account the dependence of the probability of revealing radio emission sources on the potential monitoring range at different antenna beam widths.

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