这个程序主要是实现对一个大的GPG的观测文件（Rinex）按照一定的时间进行切割。-TIMESPLITRINEX splits a RINEX GPS file by time.TIMESPLIT(FILENAME,t) breaks a RINEX file into shorter files of length t in seconds. Useful for breaking a large file into days, or a day file into hours, etc.