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Appendix F – DL Logs
74
DL™ User Manual Rev 3
META/B
The META/B log is used to display meteorological information.
META
Structure:
Field #
Field type
Data Description
Example
1 $META Log
header
$META
2 GPSWeek
GPS
week
512
3 GPSSec GPS
seconds
220400.000000
4
Flag
Valid fields (binary 000 – 111)
7
5
Temp
Temperature (degrees Celsius)
23.000000
6 Press
Pressure
(hPa)
1013.250000
7
Humid
Relative humidity (%)
55.200000
8
MetLogP
Pointer to Previous Mets Log
1536
9 *xx
Checksum
*55
10 [CR][LF] Sentence
terminator
[CR][LF]
Example:
$META,512,220400.000000,7,23.000000,1013.250000,55.200000,1536*55,[CR][LF]
METB
Message ID = 1031; Message byte count = 52
Format:
Field #
Data
Bytes
Format
Units
Offset
1 Sync
3
Char
0
(header) Checksum 1
Char
3
Message
ID 4
Integer
4
Message byte count
4
Integer
8
2 GPSWeek
4
Unsigned
Long
Week 12
3 Filler
4
Char
16
4 GPSSec
8
Double Seconds
20
5 Flag
4
Unsigned
Long
28
6 Temp
4
Float
Celsius
32
7 Press
4
Float
hPa
36
8 Humid
4
Float
Percent
40
9 MetLogP
4
Unsigned
Long
Bytes 44
10 Filler
4
Char
48
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