METHOD FOR DETERMINING THE COORDINATES OF A RADIO EMITTING OBJECT IN THE WORKING AREA OF A MULTIPOSITIONAL PASSIVE RADIO ENGINEERING COMPLEX AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2021 - IPC G01S3/46 G01S5/06 

FIELD: radio engineering.

SUBSTANCE: group of inventions relates to the field of radio engineering surveillance and can be used to determine the location coordinates of a scattered radio emission source (radio emitting object (REO)) by radio location stations using receiving posts with radio emission frequency scanning of a multipositional passive radio engineering complex (MPREC). In the claimed method, pairs of receiving posts of the MPREC, synchronised with each other in time and spaced on the territory receive the radio REO emission data through sensors with sequential frequency scanning, including the difference in the time of radio emission reception, the carrier frequency of the onboard radio electronic tool of the REO, and the time of receiving the bearing measurement. The measurement data of the receiving posts is transmitted to the central receiving post. The received data is converted in the central post into a single central Cartesian coordinate system with the origin in the central receiving post, and the coordinates of the air radio emitting object are determined by solving a range-difference problem by the criterion of the maximum of the likelihood function. In order to specify the coordinates of the object in the sectors of failure of the working area of the complex, the functional of the quadratic approximation of the differentiable likelihood function is minimised using the Newton iteration method according to the obtained initial approximation of the REO coordinates.

EFFECT: provided possibility of an all-round view and accurate determination of the coordinates of the REO in the sectors of failure of the working area of the MPREC.

2 cl, 5 dwg