Short-term forecasting method for satellite clock error data

The invention provides a satellite clock error data short-term forecasting method, which comprises the following steps of: based on original satellite clock error data, establishing a semi-parameter variable coefficient clock error forecasting model, and calculating a parameter component estimated value and a non-parameter component estimated value; the gross error of the satellite clock error data is identified, rejected and interpolated; estimating satellite clock error data; performing compensation forecasting on the fitting residual error of the semi-parameter variable coefficient clock error forecasting model based on an SVM model to obtain a forecasting value of the fitting residual error; and calculating a final satellite clock error forecast result. According to the method, a semi-parameter variable coefficient clock error prediction model integrating gross error identification and considering periodic term correction is established, a high-precision satellite clock error performance parameter estimat