Coefficients for spectral estimation of spctrl.dat a[ 1] = 1.261539 a[ 2] = -0.007693 a[ 3] = -0.646779 a[ 4] = -0.280604 a[ 5] = 0.163693 a[ 6] = 0.347676 a[ 7] = 0.111247 a[ 8] = -0.337142 a[ 9] = -0.358043 a[10] = 0.378774 a0 = 0.003511