METHOD OF DETERMINING COORDINATES OF TARGETS (VERSIONS) AND SYSTEM THEREFOR (VERSIONS) Russian patent published in 2015 - IPC G01S13/06 

FIELD: physics, navigation.

SUBSTANCE: inventions relate to radar. In the first version of the method of determining coordinates of targets, based on determining angular coordinates of a target from radio-frequency radiation reflected from said target using a passive radar station, according to the invention, the radio-frequency radiation source used is an external radar station located on the line of visibility of the passive radar station and having known coordinates and irradiating the scanned area; the method comprises receiving and measuring the time of receiving a probing signal reflected from a target and angular coordinates thereof, and receiving a forward probing signal of the external radar station and calculating the emission time thereof, and the range to the target is determined from the measured time of receiving the probing signal reflected by the target and the calculated time of emission thereof. Said technical result according to the second version is achieved due to that the method of determining coordinates of a target, based on determining angular coordinates of the target from the radio-frequency radiation reflected by the target using a passive radar station, according to the invention, the radio-frequency radiation source used is an external radar station with known coordinates and irradiating the scanned area; using an on-board radar station placed in line-of-sight range of the external radar station, receiving therefrom a forward probing signal, calculating the emission time thereof and the calculated value is transmitted at a universal time to n≥1 passive radar stations, which are used to receive and measure the time of receiving probing signals reflected by targets and angular coordinates thereof, and the range to targets is determined from the measured time of receiving the probing signal reflected by targets and the time of emission thereof received from the on-board radar station. Said technical result is achieved due to that the system for determining coordinates of targets according to the first version is a passive radar station, comprising two receiving channels and a coordinate calculating unit, each channel having an antenna and a receiver; the passive radar station also comprises a probe emission time calculating unit, a target tracking unit and a universal time sensor. The listed components are interconnected in a certain manner. Said technical result is achieved due to that the system for determining coordinates of targets according to the second version is a passive radar station, comprising two receiving channels and a coordinate calculating unit, each channel having an antenna and a receiver; the system also includes n>1 passive radar stations and an on-board radar station, and the passive radar station also includes a delay calculating unit, a target tracking unit and a universal time sensor. All listed components are interconnected in a certain manner, wherein the on-board radar station includes a unit for calculating the time when the probe is emitted by the external radar station.

EFFECT: measuring range to a detected remote target while maintaining stealthiness of operation and without power consumption on emission.

4 cl, 6 dwg