Code from Jeff Stefan's article “A Protocol for GPS Communications” (Embedded Systems Programming, May 1999). This module contains the GGA grammar functions. NMEA GGA message parser. The article is not available online; check with editorial staff for more information. Article description: “Want to utilize just about any GPS receiver? Then take advantage of the NMEA message set. The article provides a primer on the Global Positioning System, as well as hints on working with the NMEA message set.”

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