US 12,241,962 B2
Method for determining the calibration data of an airborne goniometry apparatus
Bernard Teneze, La Roque d'Antheron (FR)
Assigned to BULL SAS, Les Clayes-sous-Bois (FR)
Filed by BULL SAS, Les Clayes-sous-bois (FR)
Filed on Jul. 12, 2022, as Appl. No. 17/862,867.
Claims priority of application No. 21305980 (EP), filed on Jul. 13, 2021.
Prior Publication US 2023/0016513 A1, Jan. 19, 2023
Int. Cl. G01S 13/46 (2006.01); G01S 13/02 (2006.01)
CPC G01S 13/46 (2013.01) [G01S 2013/0245 (2013.01); G01S 2013/468 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining calibration data, for an airborne goniometry apparatus comprising an antenna array of several antennas, from several calibration data sets measured in-flight by said airborne goniometry apparatus, each associated with a measured angular position and comprising an amplitude datum and a phase datum measured by each antenna of said antenna array at said measured angular position, said computer-implemented method comprising:
for an estimated angular position, a phase of calculating an estimated calibration data set comprising
for each measured angular position, normalizing a calibration data set of said several calibration data sets that are measured at said measured angular position, with respect to the phase datum measured by each antenna of said antenna array,
wherein said normalizing provides as many normalized data sets as there are antennas in the antenna array of several antennas for said each measured angular position;
for said each antenna, calculating a candidate data set by interpolating the several calibration data sets that are measured at said each measured angular position and previously normalized with respect to the phase datum measured by said each antenna;
selecting, as the estimated calibration data set, a candidate data set whose phase reference has a highest energy among all candidate data sets from said candidate data set for said each antenna.