Inertia/polarization navigation method based on polarization and solar dual-vector switching

The invention relates to an inertia/polarization navigation method based on polarization and solar dual-vector switching. Firstly, a polarization vector is calculated according to inertial navigation output; secondly, an error vector is calculated according to polarization vector information measured by updating of a sensor; thirdly, an information discrimination factor of each polarization sensor is calculated by using the error vector, and whether each polarization sensor is reliable or not is determined; and finally, if measurement information of a plurality of sensors is reliable, the solar error vector navigation mode is entered, if only one sensor is reliable, the polarization error vector navigation mode is entered, state estimation and feedback of the two modes are realized through a Kalman filtering method, and thus the double-vector combined navigation method based on polarization and solar vectors is completed. According to the method, the measurement equation is established according to the error