Traditional attitude measurement method applies gyro

accelerometer or combined with GPS to acquire data of carrier parameters

but due to high cost

limitation of precision and structure level of device

it can’t meet the complex operational environment now. Put forward using 3-axis magnetic resistance sensor to collect the threedimensional magnetic field strength of the earth

and through amplifying

processing

eventually get ideal geomagnetic data. Through experimental test

ideal geomagnetic signal can be by achieved acquisition device.