APPENDICES Page 56
Document id: 7000 108-011 A2
APPENDIX A.2 – INTERPRETATION OF IEC 61162-1
SENTENCES
GPS and Sensor Input Sentences
DTM - Datum Reference
If local code is other than WGS84, then the positions report from
that port is discarded.
Field Comment
Local Datum Code Interpret if it’s WGS84 or not
Local Datum Subdivision Code Ignored
Lat Offset (2 fields) Ignored
Long Offset (2 fields) Ignored
Altitude Offset Ignored
Reference Datum Code Ignored
GBS - GNSS Satellite Fault Detection
If this sentence is received once a second from the position source
is in use, the RAIM flag will be set to TRUE.
Field Comment
UTC Time of GGA or GNS Ignored
Expected Error in latitude Ignored
Expected Error in longitude Ignored
Expected error in altitude Ignored
ID number of most likely failed satellite Ignored
Probability of missed detection Ignored
Estimate of bias in meters Ignored
Standard Deviation of bias estimate Ignored
GGA - Global Positioning System Fix Data
Field Comment
UTC Of Position UTC Second is used to indicate Time
Stamp
Latitude (2 fields) Used
Longitude (2 fields) Used
GPS Quality Indicator Used,
1 -> Position with Low Accuracy
2 -> Position with High Accuracy
3 -> Position with Low Accuracy
6 -> Dead Reckoning with Low
Accuracy
7 -> Manual mode with low accuracy
OTHER -> No Position
Number of Satellites in use Used when the GPS is the internal
GPS (Used in proprietary sentences)
Horizontal Dilution of precision (HDOP) Ignored
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