SelfSync3D sensor calibration message
Three-dimensional sensor calibration messages hold the calibration used to convert the raw readings of three-axis sensors (accelerometer, gyroscope, magnetometer) into physical units.
Fields
Moment the message refers to, in UTC. FIT stores it as seconds since the FIT epoch (December 31, 1989, 00:00:00 UTC); decoders usually expose it as a regular date.
sensorTypeEnumSensor the calibration applies to: accelerometer, gyroscope, compass (magnetometer) or barometer.
4 possible values
accelerometerbarometergyroscopecompass
calibrationFactorUint32Factor used to convert raw ADC readings to physical units (g, degrees per second…).
Calibration factor of the accelerometer.
Calibration factor of the gyroscope.
Divisor applied together with calibrationFactor.
levelShiftUint32Value subtracted from the raw readings to bring them back around zero before applying the calibration.
offsetCalSint32[]Internal calibration offsets, one per axis.
orientationMatrixFloat64[]Rotation matrix (3 × 3, row major) aligning the sensor axes with the device axes.
mesgNumStringGlobal message number identifying the kind of message. Decoders use it to know which profile to apply to the data.