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Thank you so much for your reply!! The signals were recorded for 30 mins. I used F-K because I thought that SPAC required a circular configuration to give good results. I have tried processing using SPAC as well, but no clear dispersion curves were visible. Should I increase the recording time? Also...

Hello I am trying to determine Vs profiles using F-K analysis. I used a linear array of 5 sensors spaced at 22m distances to record the MAM data. Then after processing I tried to pick a dispersion curve from the max file using gpviemax. But I cannot identify a clear dispersion curve. Is this due to ...