中文说明：本代码主要是针对GPS定位系统来设计i，主要阐述了GPS基本原理，利用伪随机噪声PRN来确定位置，GPS载波相位测量定位，利用4颗卫星定位。我们程序开始需要先输入一个4*25矩阵，表示了24颗卫星的位置StallitePosition
English Description：
This code is mainly designed for GPS positioning system, mainly describes the basic principle of GPS, using pseudo-random noise PRN to determine the position, GPS carrier phase measurement positioning, using four satellite positioning. At the beginning of our program, we need to input a 4 * 25 matrix to represent the position of 24 satellites