Light sensors data for blind calibration

We collected measurements from 10 high quality light sensors. We use two sensors as reference sensors to provide the ground truth and perturbed the others by covering them with paper. The data is collected in 3 different areas of a passageway. The differences of the light intensity values between areas are greater than those within the same area. In each area, we let the sensors move around together and all the observations collected correspond to the same signal. The perturbations were different in different areas, and thus the gains and offsets of each sensor were different in different areas.