System apparatus for determining position-dependent data (LxSx) of at least one transmitter (SE1-SE4) which wirelessly transmits user data (D1-D4) and location-dependent position data (L1-L4) as information data (11-14) relative to a respective receiving station (GW1, GW2) in a receiving area ; comprising: a) the at least one receiving station (GW1, GW2) which contains at least one receiver (RE1) that receives the information data (I1-I4) with a respective signal area strength value (S1-S4) from the respective transmitter (SE1-SE4); b) the respective receiving station (GW1, GW2) containing a data separator (DS1) which extracts the location-dependent position data (L1-L4) of the transmitter (SE1-SE4) from the respective information data (11-14) and forwards them, together with the respective signal area strength value (S1-S4), as position-dependent data (LxSx) to an external position data evaluation unit (DMU1), and which additionally forwards the respective information data (11-14), or at least the user data (D1-D4) thereof, to a final receiver (ER1); c) the system apparatus containing the position data evaluation unit (DMU1) which is adapted to store the position-dependent data (LxSx) in relation to the respective receiving station (GW1, GW2) over a time period and to generate and display therefrom a signal area strength chart around the respective receiving stations (GW1, GW2) in the receiving area ; d) the receiving station (GW1, GW2) being adapted to automatically determine its receiving station location data (L5-L6) and forward them, together with the position-dependent data (LxSx), to the position data evaluation unit (DMU1); and characterized in that e) the position data evaluation unit (DMU1) is adapted both to map the position-dependent data (LxSx) around the respective receiving station (GW1, GW2) and to take into account, during this process, a displacement of the respective receiving station (GW1, GW2) in accordance with the transmitted receiving station location data (L5-L6). a) the at least one receiving station (GW1, GW2) which contains at least one receiver (RE1) that receives the information data (I1-I4) with a respective signal area strength value (S1-S4) from the respective transmitter (SE1-SE4); b) the respective receiving station (GW1, GW2) containing a data separator (DS1) which extracts the location-dependent position data (L1-L4) of the transmitter (SE1-SE4) from the respective information data (11-14) and forwards them, together with the respective signal area strength value (S1-S4), as position-dependent data (LxSx) to an external position data evaluation unit (DMU1), and which additionally forwards the respective information data (11-14), or at least the user data (D1-D4) thereof, to a final receiver (ER1); c) the system apparatus containing the position data evaluation unit (DMU1) which is adapted to store the position-dependent data (LxSx) in relation to the respective receiving station (GW1, GW2) over a time period and to generate and display therefrom a signal area strength chart around the respective receiving stations (GW1, GW2) in the receiving area ; d) the receiving station (GW1, GW2) being adapted to automatically determine its receiving station location data (L5-L6) and forward them, together with the position-dependent data (LxSx), to the position data evaluation unit (DMU1); and characterized in that e) the position data evaluation unit (DMU1) is adapted both to map the position-dependent data (LxSx) around the respective receiving station (GW1, GW2) and to take into account, during this process, a displacement of the respective receiving station (GW1, GW2) in accordance with the transmitted receiving station location data (L5-L6). <EOS>