Specifications

Command/Response Formats 167
Commands
Message type 18 format:
$GPMSG,d1,d2,f3,d4,d5,d6,m7,n(d8,d9,d10,d11,d12,d13,d14,d15)*cc
<enter>
Message type 19 format:
$GPMSG,d1,d2,f3,d4,d5,d6,m7,n(d8,d9,d10,d11,d12,d13,d14,f15)*cc
<enter>
Message type 20 format:
$GPMSG,d1,d2,f3,d4,d5,d6,m7,n(d8,d9,d10,d11,d12,d13,d14,d15)*cc
<enter>
Message type 21 format:
$GPMSG,d1,d2,f3,d4,d5,d6,m7,n(d8,d9,d10,d11,d12,d13,d14,f15)*cc
<enter>
Common part of message 1,2,3,6,16,18,19,20 and 21.
Remaining message for type 1
Table 6.99: Common Fields of Type 1, 2, 3, 6, 16, 18, 19, 20 and 21
Parameters Description Range
d1 RTCM message type 1,2,3,6,16,18,
19,20,21
d2 Station Identifier 0 - 1023
f3 Z count 0 - 9999.9
d4 Sequence number 0 - 9
d5 Station health 0 - 7
d6 Total number of characters after the time item
(include the comma and <enter>)
0 - 999
m7 Current GPS time of position fix (hhmmss.ss) 00-235959.90
Table 6.100: Remainder of Type 1
Parameters Description Range
d8 User differential range error (URDE) 0-9
d9 Satellite PRN number 1-32
f10 Pseudo range correction (PRC) in meters ±9999.99
f11 Range rate correction (RRC) in meters/sec ±9.999