mask,f,a,"satmask.pl",,,Output mask image
nx,i,h,1024,,,X dimension of output mask
ny,i,h,1024,,,Y dimension of output mask
x1,r,a,,,,X coordinate of first point on line
y1,r,a,,,,Y coordinate of first point on line
x2,r,a,,,,X coordinate of second point on line
y2,r,a,,,,Y coordinate of second point on line
width,r,h,20.0,,,Width of band to be masked off
