Applying measurements of Earth’s magnetic field gradient parameters for aerial vehicle navigation problem

Information capacity of the Earth’s magnetic field gradient parameters is analyzed in the context of solving the navigation problem with the correlation-extreme method. The navigation algorithms are suggested for the design with coupling of a magnetic-gradiometry-based correlation-extremal system and an inertial navigation system. Integration is supported by the solution of the inertial navigation correction problem, which is reduced to the standard form of a linear stochastic optimal estimation problem. This problem is solved with Kalman filtering and smoothing methods.