Simple starting question. How to use the POD modes to find solutions?

[Jupihawx]

Hi!
First of all, thank you for your work.

I'd like to know, because I can't seem to find how to use ITHACA-FV futher than the POD tutorial. I am quite new to this topic

I have a case with 10 snapshot (wind around a building, with the angle of the wind changing for each case 1 to 10 in OpenFoam).
I managed to follow the fairly simple POD tutorial, and then I end up with the modes of my simulation.

I would like to know what is the way now, to calculate the coefficients a(t or theta), to reconstruct my solution with the modes.
Is there any command included in ITHACA?

Thank you in advance for your help.