[Paparazzi-devel] Altitude informations in the ground station

[Prof. Dr.-Ing. Heinrich Warmers]

Hi,
i have not found a description  what the basis of the altitude 
information of the ground station is.
I was  surprised that with no GPS fix and using the  BMP085 barometer 
fist the information was 0m.(QFE?). And with  GPS fix the altitude 
climbed up to 180m.
The GPS altitude was 54m. The  Altitude over  (MSL) at my location is  
7m . It was not possible from me,  to read the STM data.
Can someone write the information to the dokuwiki what the meaning of 
the 3  given altitudes in the ground station  is?

Heinrich