sgsim_fc - sequential Gaussian simulation program that integrates 
secondary gridded data using full linear model of coregionalization (LMC), MM1 
and MM2.
Sgsim in GSLIB2 can handle only MM1.
Parameter file for sgsim_fc is slightly different from sgsim.
No variance reduction factor that was used to improve incorrectly used MM1
is needed. MM1 requires correlation coefficient and primary variogram.
MM2  requires correlation coefficient and  2 variograms. One (gamma_B) is 
a secondary variogram, another (gamma_R) is  residual variogram. Their  
weighted sum approximates primary variogram (see paper by Journel at SCRF 98). 
gamma_prim=ro^2*gamma_B+(1-ro^2)*gamma_R.
LMC requires 3 variograms - primary, cross and secondary. They should satisfy LMC 
(see Goovarets or GSLIB manual). Note that MM2 is a particular case of LMC.

