Validation of GOCE gravity fi eld models over Poland using the EGM2008 and GPS/levelling data

Since the mid of 2010, global geopotential models based on GOCE mission data became available. The fi rst two releases of GGMs contained four different solutions while in the third release only two solutions have been generated. In the presented study the available GOCE-derived gravity fi eld models were evalu-ated in terms of height anomalies and gravity anomalies over Poland with the use of the respective functionals calculated from the EGM2008 geopotential model as well as height anomalies at 184 stations of high preci-sion GPS/levelling control traverse.The fi t of GOCE gravity fi eld models with the EGM2008 in terms of height anomalies and gravity anomalies measured with a standard deviation is below 10 cm, and 3 mGal, respectively. Their fi t with GPS/levelling height anomalies at the stations of GPS/levelling control traverse is at the level of 10 cm. The results obtained indicate some improvement of the consecutive releases of GOCE gravity field models.