This attribute defines the Coordinate System used in a summary report.
Astrogator <Satellite Object Path> SetValue <Attribute Path>.DisplayCoordSystem {Value}
The value can be any coordinate system that is defined in the Vector Geometry Tool. Make certain that the name is copied exactly. If you require additional coordinate systems, you can define them using the Vector Geometry Tool.
Astrogator */Satellite/Satellite1 SetValue MainSequence.SegmentList.Initial_State.DisplayCoordSystem "CentralBody/Mars Inertial"
STK Programming Interface 11.0.1