Radiation g=EoT g=emissivity at the wavelength mix corresponding to temperature t o=Stefan-Bolzmann's constant =5670x108W/m2-K4 T is temperature in Kelvin Primary energy transfer mechanism for spacecraft Most spacecraft have large radiators to rid themselves of heat q is the heat transfer per unit area and T is the surface temperature9 Radiation ε=emissivity at the wavelength mix corresponding to temperature T σ=Stefan-Bolzmann’s constant = 5.670 x 10-8 W/m2-K4 T is temperature in Kelvin 4 q = εσT Primary energy transfer mechanism for spacecraft. Most spacecraft have large radiators to rid themselves of heat. q is the heat transfer per unit area and T is the surface temperature