该程序为一子程序，主要用来产生北斗（beidou）B1I 频点信号的PRN码，使用时在主程序里面调用，输入卫星编号即可-This is a sub programme,used for generating the PRN codes of BEIDOU B1 frequence.When you use it,you should type in the satellite IDs in the main programme.