I would like to submit this topic to help me in the conscious choice of the parameters m and nppm for the calculation of the right ellipticity curve.
In Deliverable D4 of the Neries-jra4 project we read in the conclusions:
"The best parameter selection for the Morlet wavelet parameter m is in the range of 4-16 with preference given to m = 8. For the number of selected wavelets per minute, nppm, we recommend using the range 5 or lower, with preference to lower values as low as 1 when the recording time is sufficiently large to obtain good statistics. It is also advisable to process the data with different values of nppm to identify the stable parts of the fundamental mode ellipticity curve ".
In the case that I submit to you I would like to know if the choice made is correct or not. In the first image I have the H/V curve and those of ellipticity with different values of m and nppm = 10 (the time series have a duration of 1h). In the second I plotted the curve with m = 2 (which I considered the best) with 4 nppm values, from 3 to 20.
On the basis of the results I have identified that nppm = 5 is the curve to be used for the joint inversion (curve with singularity).
What is your opinion on this?
Thank you and greetings
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