GNSS satellite motion parameter determination method and device, medium and product

The invention discloses a GNSS satellite motion parameter determination method and device, a medium and a product, and relates to the technical field of global satellite navigation. The method comprises the following steps: determining a reference orbit and a state transition matrix at a preset moment by utilizing an orbit numerical integration method according to an initial orbit state vector based on a force model; according to the reference orbit at the preset moment and the state transition matrix, determining a corrected initial orbit state vector by using an orbit fitting method; taking the corrected initial orbit state vector as an initial orbit state vector until iteration reaches the number of iterations, and obtaining a corrected initial orbit state vector during the last iteration; and performing orbit integration and extrapolation according to the corrected initial orbit state vector in the last iteration, and determining the speed and acceleration of the satellite in the geocentric inertial coord