METHOD FOR RADAR DETERMINATION OF BALLISTIC OBJECT SPEED MAGNITUDE Russian patent published in 2017 - IPC G01S13/58 

FIELD: radars.

SUBSTANCE: invention relates to radars. Said result is achieved by that through time intervals equal to scanning period T₀ in radar stations (RS) measured are range, radial speed and altitude of a ballistic object (BO). Determined is the BO altitude evaluation in the middle of the observation interval through weighted summation of N digital altitude measurements. Determined is evaluation of the first increment of the product of range and radial speed per one scanning through weighted summation of N digital signals of the products of range and radial speed. Determined is a geocentric angle between the RS and the BO in the middle of the observation interval using the formula where r_mid – range to the BO in the middle of the observation interval, R_E – radius of the Earth. Determined is gravitational acceleration in the middle of the observation interval using the formula where g₀ – acceleration of gravity on the Earth surface. Determined is the value of the BO speed magnitude in the middle of the observation interval on an undisturbed ballistic trajectory by the formula

EFFECT: higher accuracy of determining the BO speed magnitude in ground-based RS with rough measurements of the elevation angle, azimuth and range.

1 cl, 1 tbl, 2 dwg