I have access to one SBS-1e, I have some questions however about if there is any GPS Height reported by the ADSB in the aircrafts that the SBS-1e is able to report. I mean, the BaseStation software reports ONLY the Altitude (Barometic Altitude) with a resolution of 25f/100f but it does not report the GPS Altitude/Height (Geometric Height/ Altitude GNSS), I will call it GPS height from now on

I read here (http://www.homepages.mcb.net/bones/SBS/ ... t_Data.htm) that the software (BaseStation) does not display the GPS Height but in reallity it can be extracted from the ethernet socket in the packet "MSG 6" (Surveillance ID message) (Is this the socket from the SBS or the socket from the BaseSation software?). There is a message not very well explain there that I quote here:
"BaseStation only displays Barometer altitude but in the data are HAE (height above ellipsoid), which is sent as the difference between GPS altitude and barometric altitude."
I guess that what it means is:
"BaseStation only displays Barometer altitude but in the data there is HAE (height above ellipsoid) (GPS height) available, which is sent in the field 12 instead of the barometric altitude at MSG5,6."
Can anyone that has been playing around with the sockets confirm that there is actually GPS height coming from the SBS-1e but the software never displays it? Does the BaseStation socket provide this data?
PD: Probably you are wondering why I would be interested in this if the accuracy in height is quite bad and probably useless as ATC, ok, I am planning to create a meteorological model based in the data retrieved from the aircrafts with the assumtion of GPS having between 50 and 100m error in height and the aircrafts performing alwways with an accuracy of 200f from the reported flight level (assumed for RVSM levels in Europe), some statistics, some filters and the met could be studied without the use of weather balloons??? Will se
