GPS NMEA Data Table
Note: This table is provided for use only in the MAEL educational program for K-12 students.
$GPGGA Sentence Format

Example: $GPGGA,170834,4124.8963,N,08151.6838,W,1,05,1.5,280.2,M,-34.0,M, ,*75

Name Example Data Description
Sentence Identifier $GPGGA Global Positioning System Fix Data
Time 170834 17:08:34 Z
Latitude 4124.8963, N 41d 24.8963' N or 41d 24' 54" N
Longitude 08151.6838, W 81d 51.6838' W or 81d 51' 41" W
Fix Quality:
- 0 = Invalid
- 1 = GPS fix
- 2 = DGPS fix 1 Data is from a GPS fix
Number of Satellites 05 5 Satellites are in view
Horizontal Dilution of Precision (HDOP) 1.5 Relative accuracy of horizontal position
Altitude 280.2, M 280.2 meters above mean sea level
Height of geoid above WGS84 ellipsoid -34.0, M -34.0 meters
Time since last DGPS update blank No last update
Checksum *75 Used by program to check for transmission errors

Notes:

    * Time is in Universal Coordinated Time (UTC) shown as Z
        * Latitude - First two digits are degrees; remaining digits are minutes
	    * Longitude - First three digits are degrees; remaining digits are minutes
	        * To get degrees/minutes/seconds, convert fraction of minutes to seconds by multiplying fraction by 60
		* See GPS Specification for what you can expect for your position accuracy

		Cross Contry Flight Activities Page | GPS Activities Page | GPS/Amateur Radio Home Page
		NASA/Glenn Research Center
		Educational Programs Officer: R. Lynn Bondurant
		Curator: Bruce Bream {bruce.bream@grc.nasa.gov}
		Last Update: 13 August 1996





http://www.grc.nasa.gov/WWW/MAEL/ag/agnmea1.htm