For this step in the calibration process, you will identify the feature in the data corresponding to the ring that will be analyzed. Drag the blue dots on the false color image so that the inner and outer rings span the Bragg ring of interest, just as if you were going to make a q-chi plot of that ring. This will tell Datasqueeze over what region it should do the least-squares fit. You want to make sure that the inner ring is everywhere at smaller radius, and the outer ring everywhere at larger radius, than the feature of interest, and also that no other strong features are included within that region. If you cannot accomplish this you may need to back up (using "Back") and improve the centering (small-angle mode) or scale estimation (wide-angle mode) |