Method, apparatus, and computer program product for measuring and interpreting metrics of an athletic action and an object associated therewith

An apparatus comprising;

• at least one accelerometer;
• at least one gyroscope;
• at least one magnetometer;
• and
• at least one processor,
• wherein in response the apparatus being thrown and experiencing rotation of the apparatus relative to an Earth frame of reference, the apparatus at least one processor is configured to:
• process data received from the at least one accelerometer, the at least one gyroscope, and the at least one magnetometer to determine a rotation of the apparatus in the Earth frame of reference;
• determine, from the rotation of the apparatus in the Earth frame of reference, a lift force and a drag force acting on the apparatus;
• and
• isolate the lift force from the drag force based, at least in part, on a drag coefficient and a surface area of an object associated with the apparatus.

An apparatus comprising;

• at least one accelerometer;
• at least one gyroscope;
• at least one processor;
• and
• at least one magnetometer,
• wherein in response to rotation of the apparatus relative to an Earth frame of reference, the at least one processor is configured to:
• process data received from the at least one accelerometer, and the at least one gyroscope to determine a rotation of the apparatus in the Earth frame of reference;
• receive three channels of data from the at least one magnetometer;
• determine zero crossings of a sinusoidal signal from each channel of data;
• average a time difference of two adjacent pairs of zero crossings of each of the three channels of data;
• and
• determine a period of spin from the averaged time difference.