Measurementdatab - Novatel WAAS G-III User Manual

Chapter 5

5.5.11 MEASUREMENTDATAB

This log contains the channel measurements. One log is output containing all the information for all the signal
channels. The measurement data is grouped by SV channel.
Output states:
Valid trigger:
Frequency:
Message ID:
Header Format:
Field Field Name
1 header
2 #obs
3 prn
4 svChan
5 sigChan
6 HWchan
7 Tracktype
8 Psr
9 Psr std
10 adr
11 Adr std
12 Dopp
a
13
C/No
14 Reserved
15 Reserved
16 Locktime
17 Channel status
18... Next data set, offset = H + 4 + (#previous obs x 64)
variable 32-bit CRC
a. The C/No reported in this log is computed from the tracking component only.
112
Operational
ONTIME, ONCE
Requested frequency
4103
G-III Log
Description
G-III log header
Number of data sets to follow
Satellite PRN tracked
SV channel
Signal channel
Hardware channel number
Indicates tracking type data
See Table 44, Tracking Type Data on Page 113
Pseudorange measurement (m)
Pseudorange measurement standard deviation (m)
Accumulated Doppler range (cycles)
Carrier phase standard deviation (cycles)
Instantaneous Doppler frequency (Hz)
Carrier to noise density ratio (dB-Hz)
Reserved
Reserved
Number of seconds of continuous tracking
Channel tracking status
See Table 45, Channel Tracking Status on Page 114
Format
Ulong
Ushort
Ushort
Ushort
Ushort
Ulong
Double
Float
Double
Float
Float
Float
Ulong
Ulong
Double
Ulong
Hex
WAAS G-III Reference Receiver User Manual Rev 1
Data Logs
Binary
# Bytes
Offset
H 0
4 H
2 H+4
2 H+6
2 H+8
2 H+10
4 H+12
8 H+16
4 H+24
8 H+28
4 H+36
4 H+40
4 H+44
4 H+48
4 H+52
8 H+56
4 H+64
H + 4 +
4
(#obs x 64)