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C NMEA-0183 Messages
110 DSM 132/132RS Receiver User Guide
5 Direction of longitude
E: East
W: West
6 GPS Quality indicator
0: fix not valid
1: GPS fix
2: DGPS fix
7 Number of SVs in use, 00-12
8HDOP
9 Antenna height, MSL reference
10 “M” indicates that the altitude is in meters
11 Geoidal separation
12 “M” indicates that the geoidal separation is in meters
13 Age of differential GPS data record, Type 1; Null when DGPS not used
14 Base station ID, 0000-1023
Table C.6 GGA message fields (continued)
Field Description