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DataAndConfigurationMessages / 56CourseData

Course data

Channel Number56
Total Length10 bytes
ChannelData1Data2Data3Data4Data5Data6Data7Data8Checksum

Heading (degrees / 10^-5) = Data 1, Data 2, Data 3 and Data 4 (big endian, 2's complement signed 32bit integer).

Heading is defined as the direction in which the vehicle is moving relative to true North. It is undefined when the vehicle is stationary. Heading is output in the range -180..180 degrees.

Note:

There is no generally accepted definition of heading.
We define the direction the vehicle is moving as heading, and the direction the vehicle is pointing as yaw.
Some competitors define the direction the vehicle is moving as track, and the direction the vehicle is pointing as heading.
Please ensure that you are aware of this distinction when comparing outputs from different systems.

Heading accuracy (degrees / 10^-5) = ( (Data5 & 0x7F) x 2^24 + Data6 x 2^16 + Data7 x 2^8 + Data8)

Data source = Data5 & 0x80

Data source values:

 0      raw GPS data
 1      processed data
Page last modified on October 25, 2012, at 03:43 PM