GPS规格书，可以替换Ublox,长天，鼎天，环天的模块，性价比优-GPS specifications, can be replaced Ublox, long days, RoyalTek, Central-day modules, excellent value for money

经典书籍《软件定义的GPS和伽利略接收机》一书代码，讲述GNSS软件接收机整个流程，可以把数据直接导入。-Classic Books " software-defined GPS and Galileo Receiver," a book code, about the whole process GNSS software receiver, you can import the data directly.