ashtech DG16 Reference Manual page 277

Table 8.31. Remainder of Type 18 Message
Parameter
d16 Multiple message indicator
d18 Data quality indicator
f19 Cumulative loss of continuity indicator (unfixed cycle slips
of loss of lock)
f20 Uncorrected Carrier phase (cycles) sppppppp.pppp
*hh Checksum
Table 8.32 lists the remainder of message for Type 19
Table 8.32. Remainder of Type 19 Message
Parameter
d13 GPS/GLONASS constellation indicator
d14 Frequency indicator
d21 Smoothing interval
f15 GNSS time of measurement (in GPS or GLONASS time)
d16 Multiple message indicator
d22 GPS PRN number
d18 Data quality indicator
d23 Pseudo-range multipath error indicator quantization
f24 Uncorrected pseudo-range (meters)
*hh Checksum
Typical MSG message for RTCM type 1:
$GPMSG,01,0000,2220.0,1,0,127,003702:00,2,12,-0081.30,
0.026,235,2,13,0022.86,0.006,106,2,26,-0053.42,-0.070,
155,2,02,0003.56,0.040,120,2,27,0047.42,-0.005,145*7A
NMEA Commands
Description
Description
Range
1—more messages will follow
with same time tag
0—last message
2-character hex
Range
GPS or GLO
00—L1 message
01—L2 message
0—1 minute
1—1 to 5 minutes
2—5 to 15 minutes
3—undefined
1—more messages will
follow with same
time tag
0—last message
0 to 31
2-character hex
257