GETTING STARTED GUIDE

Android 14 AltitudeConverter

Historically, Android only provided `getAltitude()` as WGS84 Ellipsoid height. Developers were forced to bundle massive binary grids (like EGM96) t...

Solving the "N" Value

To send valid MSL altitude to ArduPilot, we must solve for $N$ (Geoid Undulation) locally on the phone.

The Lumpy Earth: Ellipsoid vs. Geoid

A common "First Flight" problem with Virtual GPS is altitude error. You hover the phone at 1 meter, but Mission Planner reports -25 meters or +40 m...