METHOD FOR DETERMINING COURSE OF OBJECT ON LINEAR TRAJECTORY USING SELECTION OF RANGE SQUARES Russian patent published in 2021 - IPC G01S13/58 G01S13/66 

FIELD: radio location.

SUBSTANCE: in the claimed method for determining the course of an object on a linear trajectory using selections of range squares in a radio location system, the range r_i and azimuth β_i of the object are measured and converted into horizontal rectangular coordinates. The estimates of the rate of change of the rectangular coordinates are determined, an unambiguous estimate of the course is calculated. The estimate of the radial velocity in the middle of the observation interval is determined by means of optimal weighted summation of a fixed selection of N measured range values r_i. A fixed selection of N range square values is formed and the second increment of the range square is estimated by means of weighted summation. The estimate of the actual velocity of the object is found. The heading in the middle of the observation interval and the root mean square error (RMSE) of determination of said angle are then calculated. The azimuth in the middle of the observation interval is estimated by means of weighted summation of the measured azimuth values β_i. Two estimates of the course are determined using the values of the azimuth and heading estimates. To eliminate ambiguity, an unambiguous estimate of the course and the obtained two estimates and are used, the ambiguity of determination of the course is eliminated by the lesser difference.

EFFECT: increased accuracy and eliminated ambiguity of determination of the course of an object on a linear trajectory.

2 cl, 4 dwg, 1 tbl