1. Data Collection Scenario
case 1: Face up, Heading North
case 2: Face up, Heading South
case 3: Face up, Heading East
case 4: Face EN, Heading SE
case 5: Face SW, Heading SE
case 6: Face EN, Heading NW
case 7: Face SW, Heading NW

imu.mat
    Include all the IMU sensor data, include accelerometer, gyro, magnetic. It
    includes a 1X7 cell, each cell corresponds to a test case

pose.mat
    Include the attitude results for 7 test cases. It is also a 1X7 cell, each cell includes three
    elements: (1) a string “X-Y-Z” which indicates the
    order of rotation, (2) angles of X-Y-Z 
    (Notice the order), the unit is radian (3) a rotation matrix

3. Students need provide the results using the same format in pose.mat
