Back calculates HKL position from user specified positions of Sample Theta (A3), Sample Two Theta (A4) and both sample tilts.
A3: The hypothetical position of sample theta from which to calculate HKL. A4: The hypothetical position of sample two theta from which to calculate HKL. LTilt: The hypothetical position of lower sample tilt from which to calculate HKL. UTilt: The hypothetical position of upper sample tilt from which to calculate HKL.