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Integrator's Guide 62
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6.1.3 Bottom Track Data Record Definition (DF20)
Field Size Format Resolution/
Unit Description
Version 8 bits Version number of the Data Record Definition. (3)
offsetOfData 8 bits Unsigned #Bytes Number of bytes from start of record to start of
data (velocity/amplitude/correlation)
Configuration 16 bits Record Configuration Bit Mask
Bit 0 Pressure sensor value
valid.
Bit 1 Temperature sensor
value valid.
Bit 2 Compass sensor values
valid.
Bit 3 Tilt sensor values valid.
Bit 4 -
Bit 5 Velocity data included
Bit 6 -
Bit 7 -
Bit 8 Distance data included
Bit 9 Figure of Merit data
included
Bit 10-15 Unused
Serial Number 32 bits Unsigned
Year 8 bits Unsigned 1 Year Years since 1900 (see struct tm definition)
Month 8 bits Unsigned 1 Month Jan =0, Feb= 1, etc.(see struct tm definition)
Day 8 bits Unsigned 1 Day (see struct tm definition)
Hour 8 bits Unsigned 1 Hour (see struct tm definition)
Minute 8 bits Unsigned 1 Minute (see struct tm definition)
Seconds 8 bits Unsigned 1 Second (see struct tm definition)
Microsec100 16 bits Unsigned 100 µsec
Speed of
Sound 16 bits Unsigned 0.1 m/s
Temperature 16 bits Signed 0.01 Degree
Celsius
Pressure 32 bits Unsigned 0.001 dBar
Heading 16 bits Unsigned 0.01 Deg
Pitch 16 bits Signed 0.01 Deg