METHOD FOR SURVEY THREE-COORDINATE TWO-POSITION LATERATION RADAR RANGING OF AEROSPACE OBJECTS Russian patent published in 2020 - IPC G01S13/00 G01S13/48 G01S13/72 G01S13/87 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in ground surveillance radar systems. Technical result is achieved by the fact that form two-position radar system in active three-coordinate radar located in point 0 – beginning of coordinate system, and retransmitter of signals reflected from objects, located in point B on abscissa x at distance d from origin coordinates, estimated rectangular coordinates of aerospace objects (ASO) relative to active radar location, they are recalculated to the transponder standing point, estimated values of azimuths and angles of location of objects relative to the transponder standing point are determined. Then values of ranges R_B,k of ASO relative to repeater standing point, values of abscissas of objects for points A_k of trajectories and exact values of cosines of angles on inclined planes 0A_kx_k between axis of abscissas and inclined ranges R_0,k are calculated. Calculated on inclined planes 0A_kD passing through auxiliary point D on axis of ordinates y, distance from origin of coordinates at distance d, values of cosines of angles between inclined distances R_0,k and axis of ordinates and values of ranges R_D,k from point D to objects. After that, values of ranges R_D,k, which are average for M soundings, are determined, averaged values of rectangular coordinates are calculated and stored, as well as averaged values of angular coordinates of the ASO, repeating calculations for points A_k+1 of object trajectories at time t_k+1, storing their values and determining increments of rectangular coordinates, accurate Δx_k+1,k and averaged for the time of survey T_sur=t_k+1-t_k=Δt_k+1,k, calculating the distance covered by ASO during the time interval T_sur, modules of movement speed of objects, values of their spatial heading angles and diving angles (pitching). Periodically repeating operations on survey of specified space sector, measurement of primary parameters (distances, angular coordinates) and calculation of motion parameters (heading angles, velocity vectors and diving or pitching angles) for all located ACO, their trajectories are plotted by approximating them with vector segments .

EFFECT: determination of range values, angular coordinates, ACO velocity modules, their spatial course angles, diving or pitching angles and motion trajectories.

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