NMEA Commands 263
NMEA Commands
Typical MSG message for RTCM type 19:
$GPMSG,19,0000,1747.8,6,0,148,202908.5,GPS,0,3,200000,0,0,20,14
,15,21322294.20,0,0,04,14,15,23304544.46,*53
Table 8.38 outlines the response message.
0 Code indicator 0 = C/A code
20 GPS slot number (ID)
4 Data quality indicator (phase error £ 0.03933 cycle)
01 Cumulative loss of continuity error (cycle slips)
-8259701.2187 Carrier phase (cycles)
0 Last message for this satellite and time tag
0 Code indicator 0 = C/A code
04 GPS slot number (ID)
4 Data quality indicator (phase error £ 0.03933 cycle)
01 Cumulative loss of continuity error (cycle slips)
+5708064.4
Carrier phase (cycles)
*53 Checksum
Table 8.38. Typical MSG Message For RTCM Type 19
Field Description
$GPMSG Header
16 RTCM message type
0000 Station ID
1747.8 Z count in seconds and tenths
4 Sequence number
0 Station health
148 Total number of characters following the time tag
202908.5 Current time in hours, minutes and seconds
GPS GPS Constellation
0 L1 frequency used
3 Smoothing Interval (3—undefined)
Table 8.37. Typical MSG Message For RTCM Type 18 (Continued)
Field Description
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