Use of high-order spectral moments in Doppler weather radar

Skewness and curtosis of the spectrum are estimated by three techniques. An extension of the pulse-pair technique supplies no useful result because of crude approximation of derivatives of the autocorrelation function. Fitting of this function with a least square polynomial for differentiation requires more suitable interpolation and compensation to reduce its variance. Autoregressive spectral estimation gives the best results, but has an excessive computation burden