23 – The measurement formula
10400703;a2
Figure 23.4 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
= 20°C (+68°F); T
= 20°C (+68°F).
refl
atm
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Publ. No. T559580 Rev. a486 – ENGLISH (EN) – November 17, 2010