卫星钟差的仿真研究

目前常用的卫星钟差仿真模型中，没有考虑卫星钟差本身的随机噪声特性，或是只是简单地用白噪声代替。实际上，卫星钟的随机噪声主要由5种独立的随机噪声组成。不同种类卫星钟的噪声构成不同，同一种类卫星钟的噪声特征也不完全相同。本文使用修正Allan方差对实际钟差数据的频域稳定度进行评估。在此基础上，结合二次多项式钟差模型和5种随机噪声模型进行高逼真度的卫星钟差仿真。

Research on satellite clock error simulation

For currently common satellite clock error simulation models, the characteristics of random noise of the satellite clock error itself are not taken into consideration, or simply use white noise instead. In fact, the satellite clock error mainly comprises five types of independent random noise. Different satellite clocks have different types of noise, and satellite clocks of the same type also have different features of noise. The modified Allan variance is used to evaluate the frequency-domain stability of actual clock error data, on the basis of which the high fidelity simulation of the satellite clock error is done combining five models of random noise and the quadratic polynomial model of clock error.