10400603;a2
Figure 21.3 Relative magnitudes of radiation sources under varying measurement conditions (SW 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
Publ. No. 1557954 Rev. a155 – ENGLISH (EN) – February 7, 2006 199
21 – The measurement formula