4.3. Radiometric Correction Data DN values can be converted into Radiance as follows. 　　L = A V /G + D (VNIR and SWIR bands) 　　L = AV + CV2 + D (TIR bands) Where 　　L: radiance (W/m2/sr/μm) 　　A : linear coefficient 　　C : nonlinear coefficient 　　D : offset 　　V : DN value 　　G : gain The radiometric correction table can be extracted from the HDF file. Figures 4-4 shows the structure of radiometric coefficients. Figure 4-5 shows the relationship between detector number and image pixel position. Note that this relationship is reversed for the VNIR and SWIR bands: the detector #1 corresponds to the left end column pixels for VNIR bands, while it corresponds to the right end column pixels for SWIR bands. Figure 4-4 Structure of radiometric coefficients Figure 4-5 Relationship between detector number and image pixel position