SEMI-AUTOMATIC SELF-CONTAINED MAGNETIC AZIMUTH DETECTOR CALIBRATION APPARATUS AND METHOD

摘要

ABSTRACT OF THE DISCLOSUREApparatus for calibrating the magnetic azimuth detectorof a gyromagnetic compass system utilizes the system gyro toprovide a plurality of heading references to which the corres-ponding heading outputs of the magnetic azimuth detector arecompared to provide cardinal and inter-cardinal error data fromwhich one cycle and two cycle compensation coefficients are derived.The gyro heading references are compensated for gyro drift inaccordance with the proportionate drift occurring with respectto the total gyro drift occurring during the calibration proce-dure in accordance with coincident initial and final heading refer-ence points. The calibration is effected by orienting the aircraftin which the gyromagnetic compass system is installed at the plurali-ty of headings to provide the gyro reference and magnetic azimuthdetector data.