METHOD FOR DETERMINATION OF OBJECT SPATIAL ATTITUDE Russian patent published in 2006 - IPC G01S1/08 H04B7/185 

FIELD: mainly radio direction-finding, in particular, methods for determination of object spatial attitude, for example, flight vehicle, and azimuth and angular altitude directions to the respective beacon.

SUBSTANCE: the beacon transmitting system transmits and the on-board receiving system receives electromagnetic radiation of the radio-frequency band connected to the receiving devices by two oppositely and symmetrically positioned at an angle to each other magnetic antennas mainly with stem cores for determination of the azimuth direction and a similar device for determination of the angular altitude direction. The longitudinal axis of the object and the axis of symmetry of the antennas are similarly oriented and parallel. The received radiation is selected, its level is measured, and the trajectory of object motion in space is changed until the minimum mismatch of the levels of the signals received by the antennas is obtained, and the direction to the respective beacon is determined according to the object attitude when this condition is attained with the aid of the on-board equipment for their measurement. When the approach of the object to the respective beacon is necessary, its azimuth and/or angular altitude direction to the respective beacon is compared with the preset one, their mismatch is measured, the trajectory of object motion is corrected by decreasing the value of mismatch up to the minimum possible value, and simultaneously the object direction to the respective beacon is retained. The antennas are also screened of noise electromagnetic radiation passing from the aft hemisphere of the space, and electromagnetic radiation of the respective beacon reflected from the object surface.

EFFECT: enhanced accuracy of determination of the object location in space irrespective of the weather conditions due to the enhanced accuracy of determination of the azimuth and angular altitude directions to the respective beacon, absence of a false bearing, enhanced safety of object motion, for example, at landing, reduced mass and dimensional characteristics of the respective on-board equipment, enhanced technical-economic efficiency.

4 cl, 3 dwg