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10400703;a2
Figure 35.4 Relative magnitudes of radiation sources under varying measurement conditions (LW camera).
1: Object temperature; 2: Emittance; Obj: Object radiation; Refl: Reflected radiation; Atm: atmosphere
radiation. Fixed parameters: τ = 0.88; T
refl
= 20°C (+68°F); T
atm
= 20°C (+68°F).
Publ. No. T559598 Rev. a554 ENGLISH (EN) September 27, 2011 191
35 The measurement formula