I have a question on Instrumental measurement uncertainty. I use laser scanner sensor to measure lateral dimension of profile, it sends many data (about 800). The point in the scan is not the same. It changes the first starting point (about 0.5mm up or down) , and returns in the same position every four time.
It has an uncertain about 5mm in the center of the scan, and in extreme scan's point it is more accurate (it has an uncertain about 0.5mm in the last 10 point).
I'm interessed to extimate the dimension of profile intercepted by the scan. The scan doesen't intercept the last 10 point, but it' in the center. If I acquire data from 4 consegutive scan and take the average of the measure of the last point intercepted by the scan in profile, what is the uncertain of the measure? Can I reduce the 5mm uncertain?