此程序是Rinex3.0X格式的GNSS数据读取代码。Rinex3.0X格式与之前最常用的Rinex2.1X有较大差别，随着北斗和伽利略的建设，3.0X格式被普遍需要，所以如何更好的读取3.0X格式的数据很重要，也希望有更好方法的一起交流。(This program is using to read Rinex3.0X format GPS data . The Rinex3.0X is very different the most common format Rinex2.1X before. With the BDS and Galileo building, 3.0X format is generally required, so how to read data 3.0X format better is very important.))