This attribute sets the values for an X, Y or Z offset for the Follow segment.
Astrogator <Satellite Object Path> SetValue <Astrogator Object Path>.{Offset Attribute} <Value>
Specify the distance that the spacecraft will be offset from the leader's body frame by entering x, y, and z offset values, expressed as:
Astrogator */Satellite/Satellite1 SetValue MainSequence.SegmentList.Follow.Xoffset 100 m
STK Programming Interface 11.0.1