Azimuth in android

Question

I'm developping an app in which I'm getting the information from the orientation sensor. The only one I'm interested in is azimuth (or yaw). The thing I dont understand is :

In which way is it recorded in regard of the phone. I made an schema of the way I think it's getting the azimuth but in the facts it doesn't seem to work like this. Could you enlighten me?

http://img94.imageshack.us/img94/2899/sanstitrerti.png

Answer 1

Take a look at this resource here.

Use Google Chrome if you want it to be translated! :)