Dear Jason,
I will try the DecFact.
What I mean by the wind field modification is that it seems like not simply interpolate. Attached figure has the time series of 1Hz (top), time series from FAST output(middle), and PSD of FAST output wind field(bottom), It seems like not just interpolate but put some characterized noise (Plz see the fluctuation of the PSD).
For the WindPACT parameter, I saw the post : Tower fore-aft modes shapes. In here, you said about tower-top mass input data being wrong. If I understood wrong, just ignore it
Thanks for the quick reply.
Jae Sang Moon