about filtering and removing instrument response

[jlsanhueza]

Discussed in #372

^{Originally posted by jlsanhueza February 11, 2025}
Hi all,

I've been using this module to process some data from ZEN equipments (ex, ey, hx, hy, hz), which was pretty easy to follow.
First, I built the .h5 file using the mth5 module, which provides readers for the ZEN outputs.
Then, aurora made the trick to obtain the TFs into edi files, which completely solved my problem.

Now, I'm trying to dig some processing on my own and I saw the filtering guide in the tutorials, which allows to get slices of data, choose frequencies for the filtering and remove the instrument response. I could do all of these but it isn't clear to me if the already filtered data is automatically updated into the .h5 file or if I need to build another .h5 file with the filtered channels (cal_ex, cal_ey, etc) and then run the aurora processing scheme to obtain the TFs from the filtered/calibrated channels.

Also, for the future I'm planning to have a coherence check to try to crop some bad coherence points. I know it can be super tricky to do but is there a guide where I can begin using aurora/mth5?

Thanks in advance and for the nice guides provided!