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Research Article

Monitoring Dangerous Goods in Container Yard Using the Internet of Things

Table 3

Field meaning of GPGGA message.

GGAGlobal Positioning System Fix Data
123519Fix taken at 12:35:19 UTC
4807.038,NLatitude 48 deg. 07.038′ N
01131.000,ELongitude 11 deg. 31.000′ E
1Fix quality: 0 = invalid; 1 = GPS fix (SPS); 2 = DGPS fix; 3 = PPS fix; 4 = real-time kinematic; 5 = float RTK; 6 = estimated (dead reckoning); 7 = manual input mode; 8 = simulation mode
08Number of satellites being tracked
0.9Horizontal dilution of position
545.4,MAltitude, meters, above mean sea level
46.9,MHeight of geoid (mean sea level) above WGS84 ellipsoid
(empty field)Time in seconds since the last DGPS update
(empty field)DGPS station ID number
47Checksum data, always beginning with

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