Files visparam.data, gmode.data, omegamod.data, qextmod.data 
in ../dust_prop_0 are used.

visparam.data
  Table 2 of Ockert-Bell et al. (1997)

gmod.data, omegamod.data, qextmod.data
  Data by Forget (1998) were digitized and interpolated.

For above data, check /work02/yot/work/gcms/testdir/about_dust/params, too.

References:
  Forget (1998) Improved optical properties of the Martian atmospheric
  dust for radiative transfer calculations in the infrared, GRL, 25, 1105.

  Ockert-Bell et al. (1997) Absorption and scattering properties of the 
  Martian dust in the solar wavelengths, JGR, 102, 9039.