We present the results of a profile flown SW–NE in both directions at a nearly constant mean altitude of 1100 m with a ground speed of 230 km/h, crossing one of the most pronounced gravity anomalies in Central Europe with peak-to-peak amplitude of about 70 mgal.
The scalar gravity anomalies along the flight trajectories have been derived from the airborne gravimeter taking into account platform recordings and data from the GPS-controlled Inertial Measurement Unit (IMU) Aerocontrol IIb. All common corrections have been performed on the raw gravity data. Due to problems in GPS recording, we used the IMU data only.
To verify the airborne gravity results, ground-based and satellite-derived gravity data have been used to compute local analytical gravity field models in a new methodological approach that allows the calculation of gravity anomalies at flight altitudes. For the most part there is a good agreement between the INS-airborne-derived and the independently modelled gravity anomalies, yielding best results of about 3.5 mgal RMS.