comment : 5/5
Results:
Flux A1: -0.40
FWHM A1: -0.52
Ellipticity A1: -0.60
Flux A2: -0.38
FWHM A2: -0.43
Ellipticity A2: -0.49
Flux A3: -0.36
FWHM A3: -0.45
Ellipticity A3: -0.42
Results are more or less consistent for the 3 arrays but the flux and fwhm points do not follow a well defined parabola. The estimator based on the secondary beam power indicates a focus correction at about -0.3 mm