| 摘要 |
<p>PURPOSE:To lessen the number of sensors and economize a measuring system by laying three magnetism detectors at a fixed interval ion a straight line in a predetermined direction of the bottom of the sea in a measured sea region. CONSTITUTION:Three magnetism detectors D1-D3 are laid at a fixed interval on a straight line in a predetermined direction of the bottom of the sea in a measured sea region. A ship is made to sail from far away in the direction nearly perpendicular to the straight line to obtain distance between and magnetic moment of the ship and a central magnetism detector D2 by trial and error from an approximate position of the ship in the beginning of the measurement, approximate point magnetism dipole moment and detecting signals of magnetism detectors D1, D3 at both ends. Magnetic moment given to the proximity of the ship is obtained from the obtained magnetic moment, the sailing ship, the detecting signals of the magnetism detectors D1-D3 and the calculated distance to figure out the magnetic signal of a predetermined distance.</p> |
