Table 3 Description of the fields contained within the _opals.mat file structure.
From: Mobile Brain-Body Imaging and Visual Data of Theatrical Actors During Rehearsal and Performance
opals.sensor_name | Identification of subject and body part of sensor |
|---|---|
opals.srate | Scalar value indicating sampling rate of system (128 Hz) |
opals.ts_tstamps | Unix timestamps in microseconds |
opals.accel_calib | Nx3 matrix containing calibrated acceleration vector(x,y,z) from triaxial accelerometer at each time point N (units: m/s2) |
opals.ang_velo_calib | Nx3 matrix containing calibrated angular velocity vector(x,y,z) from triaxial gyroscope at each time point N (units: rad/s) |
opals.magn_flux_calib | Nx3 matrix containing calibrated magnetic flux vector(x,y,z) from triaxial magnetometer at each time point N (units: microtesla) |
opals.quarternion | Nx4 matrix containing orientation quarternion(q1,q2,q3,q4) at each time point N |
opals.temperature | Nx1 vector containing temperature at each time point N (units: degrees Celsius) |
opals.Tb2n | 3 × 3xN tensor containing the transformation matrix to change the frame of reference from body to navigation at each time point N |
opals.accel_gravcomp | Nx3 matrix containing calibrated acceleration vector(x,y,z) that has had the effects of acceleration due to gravity removed |
