本文重点介绍了如何通过GPS卫星星历来计算卫星的坐标，采用了直接法、拉格朗日插值法以及切尔比雪夫拟合的方法分析通过广播星历计算的精度-This paper focuses on how the GPS satellite has always calculate the coordinates of the satellite, using the direct method, Rugby

Long Day interpolation Mitchell Chebyshev fitting method to analyze the accuracy of calculation of the broadcast ephemeris