The covariance data must be [] or a 5D array COVARIANCE(NY,NU,FREQS,:,:) where the last two dimensions store the 2-by-2

[fyousefi]

The covariance data must be [] or a 5D array COVARIANCE(NY,NU,FREQS,:,:) where the last two dimensions store the 2-by-2 covariance matrix for the response for a chosen I/O pair and frequency value. Type "help idfrd" for more information.