Dear Sir or Madam. I am currently conducting research on cattle grazing, in naturally valuable areas. An interesting addition would be the activity of movement, feed intake and rumination. Does anyone know the ready-made systems based on the GPS and 9-axis motion tracking device, including 3-axis gyros, accelerometer and magnetometers, which I could buy in Poland, possibly in Europe. Maybe someone would be interested in cooperation. There have already been several projects based on Arduino. Yours faithfully.