Card 6 - View Factor, Solar View Factor, Earth, Orbit, and Convective Conductance Request

Cards 6 data include instructions for the VUFAC module to calculate thermal couplings, or geometrical radiation parameters, which may be view factors, solar view factors, Earth view factors, or albedo factors.

To run VUFAC, on Card 2a M = 2 must be specified.

For an element to be recognized by the VUFAC module it must be a SURFACE or a hydraulic element. If an element is referenced on a Card 9 PARAM NORAD Card, it will not take part in radiation calculations, but will be recognized for thermal coupling calculations.

If duplicate radiation parameters are written on file VUFF because of sequential runs, only the last ones will be considered valid. However, all the duplicated thermal couplings written on file MODLF are considered to be valid.