Scaling

During scaling the partials that were integrated in two dimensions are integrated across image boundaries to come to a full three dimensional integration.

The scale card has options to correct the data for absoption effects and decomposition.
The scale factor per frame can be restrained to dampen overshoot effects.
The B-factor is usually kept fixed, to indicate decomposition effects are neglectable. Optionally it can be refined under constraints to make a decomposition correction.

Internal absorption correction

The default setup is to use scale restrain with a value of 0.02 for variation in adjacent frames.
The resulting scale curve usually resembles a psi scan absorption curve, i.e. it has a periodicity of 180 degrees.

External absorption correction

If an external absorption correction by other programs is desirable, the data must be made available without applying any correction. This is done by using the options to fix B, a scale restrain of 0.00001 and requesting direction cosines output (external scaling).

Output of Scaling

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