A Fast-Study Model of Aircraft Magnetic Field Based on Two Flights Data

In order to reduce the study time in magnetic survey, a fast-study model of aircraft magnetic field was put forward here on the basis of the small signal model proposed by S.H. Bickel. The fast model uses the original induced and eddy-current parameters to recalculate the new permanent parameters. It can reduce the study flight amount from two to four; so the study time can be reduced from about 4 to 8 min at one time. Finally, a simulation was conducted to compare the compensation effects between the small signal model and the fast-study model. The result showed that the compensation effect of fast model was still very close to the effect of small signal model. So the new model can be used in magnetic survey if time is limited.