For the DISA optimization operand, what do the User Defined Values A, B, C, and D do? And does this operand output distortion coefficients or just relative distortion between field angles?
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Hi Michael,
The A, B, C, and D values define the particular ABCD matrix used in grid distortion, and there are details on the Grid Distortion help page. Briefly, from the help page:
So if you have those coefficients, the distortion value can be computed. The output is radial, X, or Y according to the Data flag.
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