Quick star selection method based on Beidou satellite signal intensity weight optimization model

The invention discloses a quick star selection method based on a Beidou satellite signal intensity weight optimization model. The problem of low calculation efficiency in an existing method is solved.The method comprises the steps that firstly, through the Beidou satellite signal intensity weight optimization model, an orientation and intensity matrix G is obtained; a satellite with largest energy is obtained, and a quick, robust-recursive and separable non-negative matrix factorization algorithm is used for determining three remaining satellites; four satellites with highest signal intensityare selected for combining and optimizing the orientation and intensity matrix, and finally an optimum geometric accuracy factor is obtained. According to the quick star selection method, the satellites are selected by introducing a non-negative matrix factorization method, the calculation speed is increased, the calculation amount is reduced, the star selection efficiency is greatly improved, and meanwhile the precise st