require(airGR)

## transformation Raw->Transformed for the GR1A model
    Xraw  <- matrix( c(  0.625,
                         1.250,
                         1.875),
                        ncol=1,byrow=TRUE)
    Xtran <- TransfoParam_GR1A(ParamIn=Xraw ,Direction="RT")

## transformation Transformed->Raw for the GR1A model
    Xtran <- matrix( c( -5.00,
                        +0.00,
                        +5.00),
                        ncol=1,byrow=TRUE)
    Xraw  <- TransfoParam_GR1A(ParamIn=Xtran,Direction="TR")