METHOD OF DETERMINING COORDINATES OF COUNTER-BATTERY RADAR STATIONS Russian patent published in 2024 - IPC G01S5/06 G01S13/46 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of electronic reconnaissance of emitting radio electronic means of radio communication, radio telecontrol, radar, and can be used to determine location of counter-battery radars (CBR) based on measuring the Doppler frequency of the CBR signal reflected from the projectile, the trajectory of which is known. In the disclosed method, determining the carrier frequency of the CBR signal and the Doppler frequency of the signal reflected from the projectile is carried out by a ground-based radio station of signals intelligence (SIGINT), which implements combined processing by two-channel radio receiving equipment of CBR signals reflected from a projectile, and CBR signals relayed by an air repeater. Location of the CBR is determined by calculating the Doppler component generated by the movement of the projectile with a known speed relative to the CBR, as the difference in the total Doppler frequency of the radar signal received by the SIGINT station, and the calculated Doppler frequency component generated by the projectile movement relative to the SIGINT station, the coordinates of which are known, and then calculating the cosine of the angle between the projectile velocity vector and the direction to the CBR position. Angle determines the cone, the vertex of which coincides with the position of the projectile, and the generatrices are directed to possible positions of the CBR. Line of intersection of the surface of the cone with the surface of the earth determines the possible locations of the CBR. When repeating calculations for several positions of the projectile on the trajectory and two or more directions of fire, the location of the CBR is uniquely determined.

EFFECT: reduced number of reception posts with radio receiving equipment and increased security of the system as a whole.

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