This paper provides an overview of the non - grey radiation modeling capabilities of Cullimore and Ring 's Thermal Desktop(Registered TradeMark ) Version 4.8 SindaWorks software . The non - grey radiation analysis theory implemented by Sindaworks and the methodology used by the software are outlined . Representative results from a parametric trade study of a radiation shield comprised of a series of v - grooved shaped deployable panels is used to illustrate the capabilities of the SindaWorks non - grey radiation thermal analysis software using emissivities with temperature and wavelength dependency modeled via a Hagen - Rubens relationship .