Geomagnetic sensor real-time correction algorithm introducing GPS auxiliary information

The invention belongs to the field of sensors, and particularly relates to a geomagnetic sensor real-time correction algorithm introducing GPS auxiliary information. Comprising the following steps: (1) calibrating a two-position correction assembly to obtain a function relational expression of a rotation interference magnetic field and a rotation speed of the canard rudder motor; (2) in the flight of the high-rotation two-dimensional guided projectile, calculating an attitude conversion matrix # imgabs0 # from a navigation coordinate system n system to a projectile body coordinate system b system by combining three-axis speed information provided by a GPS satellite module with trajectory information of the projectile of the high-rotation two-dimensional guided projectile, and calculating a motor interference magnetic field; and calculating a corrected actual output value Breal of the geomagnetic sensor by using a vector synthesis parallelogram principle. The invention provides a simple and quick method for co