Ciao,
Antonio IK8XFV (with my support) has developed an APP for Android to calculate QO-100 NB Transponder Link budget.
Here is the link at the Google Play store:
https://play.google.com/store/…studios.eshail2linkbudget
It also contains aiming and skew angles calculations.
Please, let us know if results match your experience.
Best 73 de
Fabio, IZ5XRC