10400703;a2
Figure 21.4 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).
21
170 Publ. No. 1557966 Rev. a155 – ENGLISH (EN) – February 6, 2006
21 – The measurement formula
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