% White Pupil Echelle Spectrograph variables:

x1  aveop1(x)  Image plane point 1, x-component
y1  aveop1(y)  Image plane point 1, z-component
z1  aveop1(z)  Image plane point 1, y-component
x2  aveop2(x)  Image plane point 2, x-component
y2  aveop2(y)  Image plane point 2, z-component
z2  aveop2(z)  Image plane point 2, y-component
x3  aveop3(x)  Image plane point 3, x-component
y3  aveop3(y)  Image plane point 3, z-component
z3  aveop3(z)  Image plane point 3, y-component