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Data Logs
Chapter 3
3.4.69 RTCMDATA1819 Raw Measurements
RTK
See the chapter on Message Formats in Volume 1 of this manual set for information on RTCM
standard logs.
Message ID:
Log Type:
Field #
1
2
3
4
399
Synch
Field type
header
RTCM header
(for RTCM18)
5
6
7
8
freq
9
10
Reserved
GNSS time
Data Description
Log header
RTCM message type
Base station ID
Modified Z count where the Z count
week number is the week number
from subframe 1 of the ephemeris
Sequence number
Length of frame
Base station health, see
REFSTATION on Page 246
Frequency indicator where
0 = L1
2 = L2
(1 is reserved for future use)
Global Navigation Satellite System
(GNSS) time of measurement
(microseconds)
11
#obs
Number of observation with
information to follow
12
multi bit
Multiple message indicator
13
code
Is code P Code?
0 = FALSE
1 = TRUE
14
sat type
Satellite type
0 = GPS
1 = GLONASS
15
prn
Satellite PRN number
16
quality
Data quality indicator, see Table 69,
RTCM1819 Data Quality Indicator
on Page 263
17
continuity
Cumulative loss of continuity
indicator with a loss of lock counter
18
phase
Carrier phase (1/256 cycles)
19...
Next RTCM18 observation offset = H+40 + (#obs x 28)
Continued on Page 262
Format
Binary
Bytes
Binary
Offset
Ulong
Ulong
Ulong
H
4
4
4
0
H
H+4
H+8
Ulong
Ulong
Ulong
4
4
4
H+12
H+16
H+20
Ulong
4
H+24
Ulong
Long
4
4
H+28
H+32
Long
4
H+36
Ulong
Ulong
4
4
H+40
H+44
Ulong
4
H+48
Ulong
Ulong
4
4
H+52
H+56
Ulong
4
H+60
Long
4
H+64
OEM4 Family Firmware Version 2.300 Command and Log Reference Rev 16
261