Specifications

Command/Response Formats 169
Commands
Remaining for Message type 18/20 (RTK carrier phase corrections)
size for type 18/20:
total number of svs for L1 and L2 frequency +2*(10 byte freq+GNSS) + 3
byte chksum + 2 byte <enter>
Table 6.104: Remainder of Type 18 and 20 Messages
Parameters Description
Range
d8 L1 or L2 frequency 00...01
d9 GPS time of measurement 0..599999 [usec]
d10 half/full L2 wavelength
indicator
0 - full, 1 - half
d11 CA code /P code indicator 0 - CA, 1 -P
d12 SV prn 1..32
d13 data quality 0..7 refer to RTCM spec. for table of phase error
d14 cumulative loss of continuity
indicator
0..31
d15 type 18 - carrier phase
type 20 - carrier phase
correction
+/- 8388608 full cycles with resolution of 1/256 full
cycle
+/- 16777216 half cycles with resolution of 1/128 half
cycle
+/- 32768 full wavelengths with resolution 1/256 full
wavelength
+/- 65536 half wavelengths with resolution of 1/128
half wavelength