中文说明：我们在定位计算中曾经指出至少应用4颗卫星的伪距测量才能完成定位和时钟偏差校正卫星的空间轨道设计和运行时间的安排保证了在地球任意位置接收机可以同时接收8颗卫星的信号当多于4颗卫星处于可见状态时有两种处理方法(使用所有卫星的测量结果)#通过某种算法找出导航精度最佳的0颗卫星
English Description：
In positioning calculation, we have pointed out that the pseudorange measurement of at least four satellites can be used to complete the positioning and clock offset correction. The space orbit design and operation time arrangement of satellites ensure that the receiver can receive the signals of eight satellites at any position on the earth at the same time. When more than four satellites are in the visible state, there are two processing methods (using the measurement results of all satellites) # # The algorithm finds out 0 satellites with the best navigation accuracy