
      NIRS Calibration Info
      ---------------------

      This directory contains the calibration tables with detached labels.
      The NIRS calibration procedure uses the files of "nirs_vol2rad_pls.tab"
      and "nirs_vol2rad_als.tab" in the case of the point and area light
      source respectively to convert from raw NIRS output (Voltage) to
      radiance, and uses the file of "nirs_solar_spc.tab" to convert to I/F.
      The central wavelengths of NIRS detector channels are given by

      lambda (nm) = -23.56*n + 2271.44,
                                        
      where n is channels number 1-64.
