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Chapter 5
Field
Field Name
11
Time status
12
Week
13
Milliseconds
14
Reserved 5
15
Reserved 6
a. The GPS week number count has been incremented by 1 every week and the field is modulo 1024
(i.e. set to 0 after 1023 weeks). The last roll-over occurred at 23:59:47 UTC on 21 August 1999. The
previous rollover should be accounted for in determination of GPS week number by the user. The
next roll over is expected at April 7, 2019.
Field
Field Name
1
Sync
Message
2
length
3
Messaged id
4
Log count
5
Time status
6
Week
7
Milliseconds
8
Reserved
9
Reserved
10
Reserved
a. The GNSS week number count has been incremented by 1 every week and the field is modulo 1024
(i.e. set to 0 after 1023 weeks). The previous rollover should be accounted for in determination of GNSS
week number by the user.
86
Table 27: Legacy Log Header Format (continued)
Description
Quality of the GPS time
20 = Unknown
100 = Coarse
160 = Fine
200 = Sattime
a
GPS week number
Milliseconds from the beginning of the GPS week.
Reserved. Set to 0.
Reserved. Set to 0.
Table 28: G-III Log Header Format
Description
Hexadecimal 0xAACC4756
Total length of the message including the header
but not the CRC
Message ID
Number of logs output since receiver entered
configuration state, for all G-III logs from the same
port. Legacy logs are not included in this count.
Resets to 0 when the maximum value
(4 294 967 295) is reached.
Quality of the GNSS time
0 = Unknown
1 = Coarse
2 = Fine
3 = Sattime
a
GNSS week number
Milliseconds from the beginning of the GNSS week.
Reserved.
Reserved.
Reserved.
Format
Enum
Ushort
Ulong
Ulong
Ulong
Char[4]
Ushort
Ushort
Ulong
Enum
Ushort
Ulong
Ulong
Ushort
Ushort
WAAS G-III Reference Receiver User Manual Rev 1
Data Logs
Binary
# Bytes
Offset
1
13
2
14
4
16
4
20
4
24
Binary
Format
# Bytes
Offset
4
0
2
4
2
6
4
8
2
12
2
14
4
16
4
20
2
24
2
26
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