:term:`FOLLOW_STEP_SCALE <FOLLOW_STEP_SCALE (SCF)>`
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      When using :term:`STABILITY_ANALYSIS <STABILITY_ANALYSIS (SCF)>` ``FOLLOW``, how much to scale the step along the eigenvector by. A full step of :math:`pi/2` corresponds to a value of 1.0. 

      * **Type**: double
      * **Default**: 0.5

