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A NEW METHOD OF NAVIGATION SATELLITE CLOCK BIAS PREDICTION AND INTERPOLATION

On the basis of quadratic polynomial, the model of least??squares collocation to estimate satellite clock bias is established by considering the random part of satellite clock bias. To determine the covariance function of this model, the paper selects the empirical function and combines the experiments of clock bias data comparing to the covariance function fitting of least??squares collocation, then obtains reasonable value ranges of the parameter for the model’s covariance function. Finally, the model is certified to have a good performance in the short??term prediction of clock bias and can be also served as a new interpolation method by comparing with common algorithms of clock bias prediction and interpolation.