TAK 2000 User Constants - General

Special USER constants can also be defined in the CONTROL DATA block. User constants differ from program control constants in that they are always optional. They can be referenced and used in all data and logic blocks (except OPTIONS data). Examples follow:

E_outer = .00081 , A_outer = 5.617E+05, T_outer = 8. $ Outer MLI OS to OVCS

E_outer is the effective emmitance of the MLI blanket between the outer vacuum shell and the outer vapor cooled shield.
A_outer is the area of the MLI blanket between the outer vacuum shell and the outer vapor cooled shield.
T_outer is the thickness of the MLI blanket between the outer vacuum shell and the outer vapor cooled shield.

These constants are used in equations later in the model, to alter the basic structure of a model. The ability make major changes to the thermal model by merely changing a few user constants make user defined constants an extremely powerful feature of TAK 2000.

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