Land north-seeking method and device based on single-axis high-precision gyroscope

The invention provides a land north-seeking method and device based on a single-axis high-precision gyroscope, and the method comprises the steps: enabling the single-axis high-precision gyroscope to enter a north-seeking state when a ground moving carrier is static at a first position, enabling the axial direction of the single-axis high-precision gyroscope to be perpendicular to a vertical axis of a carrier coordinate system, and enabling the single-axis high-precision gyroscope to enter a north-seeking state according to the output of the single-axis high-precision gyroscope and the output of a double-axis accelerometer; obtaining two first possible azimuth angles by adopting an attitude determination algorithm based on incomplete double-vector observation; and the azimuth angle of the current position is determined by comparing the two first possible azimuth angles with the azimuth obtained by the navigation system or adopting a ground moving carrier two-position method. According to the invention, the si