Getting sensitivity map or Fresnel weights map

[makeabhishek]

Hi,
How can we obtain the Fresnel weights as shown in below figure using #Pygimli in traveltime tomography?

Ref: Gance, Julien, et al. "Quasi-Newton inversion of seismic first arrivals using source finite bandwidth assumption: Application to subsurface characterization of landslides." Journal of Applied Geophysics 87 (2012): 94-106.

[halbmy]

I've made some modifications to the Fatray operator so that it is now working again, however, not yet with secondary nodes which is the next step before I can push it.

I've made a notebook using the normal and the fatray operator and also showing the Fresnel weights, based on the example field data set:
https://github.com/gimli-org/notebooks/blob/main/traveltime/fatray.ipynb

Here's the Fresnel weight image again: