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calalpha: verify kappa support angle

"calalpha" is a program to verify the value of the "kappa support angle" on the KappaCCD by analysis of images of an AMBI crystal made at chi=90 and chi=-90

Usage

calalpha [options] [make]

Without the "make" argument, the "calalpha" program will analyze any images named "alphacal01f##" and "alphacal02f##.kcd" in the current directory. With the argument "make" it will make 2 sets of 4 images first, and then analyze these.

By studying the rotation between the different images, the kappa support angle is determined, and if it is significantly offset, the program will print some instructions.

Options

The program accepts the following command line arguments:

frametime=#: Adapt the measurement time per frame.
frameangle=#: Change the phi rotation per frame.
dx=#: Change the dx at which the calibration is performed.
n=#: Change the number of frames to create. Increasing this above the default value of 4 may increase the accuracy of the test.

As options, one can give "frametime=#", "frameangle=#" and "dx=#" if the default appears inadequate. Please tell us if you need this, and try to figure out why...

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Next: caltheta: calibrate theta zero-point