The present invention relates to the angular calibration of passive
reception systems such as sonars or active ones such as certain radars
whose angular performance is inadequate.The invention proposes a method
making it possible to perform antenna calibration using the detection
system associated with this antenna under real operating conditions.The
method according to the invention consists in making an immersed
noisemaker deployed along a substantially rectilinear uniform trajectory
and a submarine equipped with an antenna to be calibrated along any
trajectory whatsoever, but nonrectilinear.The method according to the
invention consists also in implementing a trajectography algorithm making
it possible to determine the noisemaker-antenna relative distance at
known instants the, and to deduce therefrom the trajectory followed by
the noisemaker as well as the bearing corresponding to the positions of
the noisemaker at the measurement instants. The bearing thus calculated
is compared with the bearing measurements carried out directly by the
sonar associated with the antenna to be calibrated.This method applies in
particular to the calibration of sonar antennas during their
commissioning.