Instruction manual

Page 112 Z-12 Real-Time Sensor Operation and Reference Manual
The structure for RTCM message type 3 is:
$GPMSG,rr,sss,zzz.z,s,h,ccc,hhmmss:ss,sxxxxxxx.xx,syyyyyyy.yy, szzzzzzz.zz
where the fields are as defined in Table 4.59.
Example 2:
Typical Response: $GPMSG,03,0000,1200.0,7,0,038,231958:00,
-2691561.37,-4301271.02,+3851650.89*6C
where each item is as described in Table 4.60.
145 IODE for SV 27
7A Message checksum in hexadecimal
Table 4.59: Structure for RTCM Message Type 3
Field Description
rr RTCM type
sss station identifier, 0000 to 1023
zzz.z Z count in seconds and tenths, 0000.0 to 3600.0
s sequence number, 0 to 7
h station health, 0 to 7
ccc total number of characters after the time item, 000 to 999
hhmmss:ss current GPS time of position computation in hours, minutes, seconds
sxxxxxxx.xx metric x - distance from geocenter (x component of station)
syyyyyyy.yy metric y - distance from geocenter (y component of station)
szzzzzzz.zz metric z - distance from geocenter (z component of station)
*cc checksum
Table 4.60: Typical RTCM Message Type 03
Item Description
$GPMSG Header
03 RTCM type
0000 Station ID
1200.0 Z count in seconds and tenths
7 Sequence number
0 Station health
Table 4.58: Typical RTCM Message Types 1 and 9 (continued)
Item Description