get the solution space contribution to parameter error variance
             at a singular value (G * obscov * G^T)

        Parameters
        ----------
        singular_value : int
            singular value to calc second term at

        Returns
        -------
        second_parameter : pyemu.Cov
            second term contribution to parameter error variance

def second_parameter(self, singular_value):
        """get the solution space contribution to parameter error variance
             at a singular value (G * obscov * G^T)

        Parameters
        ----------
        singular_value : int
            singular value to calc second term at

        Returns
        -------
        second_parameter : pyemu.Cov
            second term contribution to parameter error variance

        """
        self.log("calc second term parameter @" + str(singular_value))
        result = self.G(singular_value) * self.obscov * self.G(singular_value).T
        self.log("calc second term parameter @" + str(singular_value))
        return result