Method and system for calibrating time-varying parameters of laser radar

The invention relates to a method and system for calibrating time-varying parameters of a laser radar, and the method comprises the steps: obtaining measurement information of a structure carried by a multi-beam laser radar satellite, and determining a plurality of ground track intersection points of each laser beam according to the measurement information; obtaining a system error model parameter resolving equation of each laser beam according to the position difference of the ground track intersection points, a relative distance of the position components and a partial derivative of the pointing system error model parameter; and with a parameter optimization estimation method, obtaining a time-varying component parameter estimation value of the distance system error model and a time-varying component parameter estimation value of the pointing system error model. According to the method, under the condition that a ground calibration field does not need to be arranged, accurate estimation and simultaneous cal