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GoProOnlySoftware / DataThatIsAvailable

Data that is available

• GPS position and velocity, normally at about 18-20Hz
  
• 3 axis accelerations at 100Hz
  

From this basic data the following can be calculated in the software:

• Distance
  
• Total acceleration or type grip
  
• Vehicle power at the wheels
  
• Motorcycle lean angle
  
• Lap and sector times
  
• Time slip and time slip rate, that is how much faster/slower than a previous lap/sector
  
• Simulated time slip and time slip rate, that is how much faster/slower than an idealised case
  

Accelerometer data

Whilst the GPS data from a GoPro camera is generally quite good, the accelerometer data can be problematic. The issues are:

• For the acceleration data to be accurate, the camera must be mounted square and level. If not, or the camera moves the accelerometer data is largely unusable.
• The GoPro quite often vibrates lots on its mount, this is measured by the accelerometers and needs to be filtered out.
• The GoPro stores the acceleration axes and sign conventions differently on each model, and there is no way for the RT GoPro software to tell how this is done for a given video. GoPro may also change the formatting again in future models. While the RT GoPro software attempts to identify each accelerometer axis using GPS data, this is not 100% reliable – this relies on some significant G-forces in the file, and the camera being mounted level.
• The GoPro software can alternatively calculate accelerations from good-accuracy GPS data, if the accelerometer data is unusable. This can be found in the variables “GPS lat accel” and “GPS long accel”.