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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