METHOD FOR SINGLE-BEAM MEASUREMENT OF ALTITUDE AND COMPONENT VELOCITIES OF AIRCRAFT AND RADAR ALTIMETER THEREFOR Russian patent published in 2015 - IPC G01S13/42 

FIELD: physics, navigation.

SUBSTANCE: group of inventions relates to radar location of extended targets and can be used to measure the altitude and component velocities of aircraft. The method includes vertical probing of the earth's surface with a radar signal through a widely directional antenna, coherent reception of the reflected signal to obtain a two-dimensional radar image of the area in range - Doppler frequency coordinates, preliminary estimation of the altitude of the aircraft which reduces prior uncertainty, wherein the method includes, on the obtained radar image, finding a maximum contrast curve in range - Doppler frequency coordinates, calculating the maximum contrast curve for all a priori possible combinations of the travelling V_P and vertical V_V components of velocity during flight at altitude H; through hypothesis search, finding the hypothesis which corresponds to the minimum sum of squares of differences of the hypothetical maximum contrast curve from the maximum contrast curve obtained from the radar image.

EFFECT: single-beam measurement of altitude and component velocities of aircraft based on a radar altimeter while reducing dimensions of the antenna system.

4 cl, 6 dwg