Towed Ocean Bottom Magnetometer to measure geomagnetic vector based on AMR sensor and SINS

The measurement of ocean bottom geomagnetic vector can provide geomagnetic vector diagram which reveals more detail of orebody distribution for ocean geologists. Former high-precision geomagnetic sensors meet difficulties when measuring geomagnetic vector and applying in ocean bottom. 3 component fluxgate magnetometer should improve its sensitivity and reliability. This paper described a new Ocean Bottom Magnetometer in towed operation to measure geomagnetic vector with high sensitivity and reliability. Anisotropic Magneto Resistive sensor and Strapdown Inertial Navigation System are introduced. Long-distance data transmission system and simplified data visualization algorithm are also designed for practical operation.