WP7609 GNSS attitude

IoT Modules
1

I have been testing WP7609 GNSS function in drone.
latitude and longitude value are good, but attitude value is not stable. (attitude difference is big) We need exact and stable attitude value in drone application. Can you guys help for this issue? how should I improve next step?

THanks
BK

2

will there be any improvement if using AGPS with XTRA or SUPL?
I remember using SUPL, I can do it in indoor area