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In order to eliminate the magnetic interference such as induced magnetic field��eddy magnetic field produced by the change of aircraft attitude in aeromagnetic survey��the interference field model is presented in this paper�� We use the method of compensation to correct the affection of the aircraft attitude�� To verify the validity of the method��we process the aeromagnetic data of M area by correcting the real- time posture�� The results show that after correction the magnetic data of total field are in accordance with the International Geomagnetic ��eference Field�� In conclusion��the real time compensation method can eliminate the effect of the aircraft on the quality of the magnetic survey��