In which file can I modify the altitude acquisition?

I am french student in electronical and embedded system, looking for help. In my project, I have to read data from radar and display this into Mission Planner. So I found GitHub folders and I remarked “alt” is public class. Can I modify the altitude aquisition ? If yes, in which file, please ?

The Rangefinder1-10 values are already displayed in the Status tab.

Thank you for your help