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20
The measurement formula
Figure 20.3 Relative magnitudes of radiation sources under varying measurement conditions (LW cam-
era). 1: Object temperature; 2: Emittance; Obj: Object radiation; Refl: Reflected radiation; Atm: atmos-
phere radiation. Fixed parameters: τ = 0.88; T
= 20°C (+68°F); T
= 20°C (+68°F).
refl
atm
89
#T810204; r. AA/43079/43091; en-US
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