GPS信号的分析文档，主要对GPS返回的信号代表的含义进行注释-GPS Document

该文档实现GPS数据的解析，透彻分析了与GPS相关的NMEA0183协议，我在学习时受益匪浅。-The document to realize the GPS data analysis, thoroughly analyze the related NMEA0183 agreement with GPS, I benefited from in the study.