# File lib/numru/nusdas.rb, line 1045
    def total
      if @meta[:projection] == "RG  "
        parm = @meta[:subc]["RGAU"]
        raise("parameters RGAU in SUBC do not exist") unless parm
        size = parm[:i_n].max * parm[:j_n]
      else
        size = @meta[:size]
        size = size[0]*size[1]
      end
      size*@meta[:nplane]*@meta[:nvalidtime]*@meta[:nmember]*@meta[:nbasetime]
    end