METHOD FOR DETERMINING COORDINATES OF RADIO-FREQUENCY RADIATION SOURCE IN THREE-DIMENSIONAL SPACE Russian patent published in 2018 - IPC G01S5/12 

FIELD: radio engineering and communication.

SUBSTANCE: invention relates to radio engineering and can be used in passive systems for locating radio-frequency radiation sources (RFRS), located on rough terrain. Essence of the invention lies in the arrangement of four receiving points (RP) located on unmanned aerial vehicles (UAVs) of "multi-copter" type in the area of the supposed location of RFRS. RPs are delivered to the specified area by means of an unmanned or manned medium-class aircraft. Composition of each RP includes a navigation-and-provision unit, non-directional antenna, panoramic receiver, transceiver. In the area where RFRS is supposedly located, the receiving points are distributed in space by command from the ground control and processing station (GCPS), thus forming the time-difference system (TDS) of location. Receiving points are located at the tops of the tetrahedron: peripheral RPs – at the vertices of its lower base, and the reference one – at the top above the base. In the generated TDS, signals from the navigation and time support units of each RP are used to determine their coordinates in space, high-precision binding to the own coordinate system of TDS and transfer of coordinate information about peripheral RPs to the reference one. Upon command from it, all RPs search for RFRS signal in the specified frequency range and when a signal is detected, it is relayed to the reference one. Reception and retransmission of RFRS signal by receiving points are carried out by their panoramic receivers and transceivers, respectively. On the reference RP based on the calculation of the correlation between the signal received thereon, and signals retransmitted from peripheral RPs, the coordinates of detected RFRS are computed and sent to GCPS. On the GCPS, the error value of the received coordinates is estimated and if the required value, set by the operator, is exceeded, recalculation of the coordinates of all RPs is carried out for their reconstruction. Such reconstruction of RPs with respect to RFRS is carried out until the error in determining its coordinates is established below the required value.

EFFECT: achieved technical result consists in the decreased error of determining RFRS coordinates.

1 cl, 8 dwg