Could you please confirm what ellipsoid the Alpha RTK uses.
WGS84 ellipsoid used as default.
Thank you for confirming.
The geoid model, please? Thanks,
Not sure what is the geoid model you need exactly.
The altitude in GGA is Mean Sea Level Altitude.
(WGS84 altitude) = (Mean Sea Level Altitude) + (Geodal Separation from GGA)
My guess is that if you need to transform to other geoid model, you can first convert WGS84 longitude / latitude / altitude to ECEF(x,y,z) then make other transformation?