https://cxidb.org/data/217/Geometry_and_calibration/Dark+Atten_Shift3.mat
https://cxidb.org/data/217/Geometry_and_calibration/Dark+Atten_Shift5_noCMNC.mat
https://cxidb.org/data/217/Geometry_and_calibration/Geom+Mask_Shift3.mat
https://cxidb.org/data/217/Geometry_and_calibration/Geom+Mask_Shift5.mat