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Table 5 Statistics of the differences between the GNSS/levelling points and the GGM [Unit: (m)]

From: A high-resolution gravimetric quasigeoid model for Vietnam

GGMs d/o of GGM Mean STD Max Min
DIR-R5 260 0.455 0.235 1.281 − 0.305
DIR-R5 + RTM 260 0.543 0.184 1.138 − 0.155
DIR/EGM + RTM 2159 0.515 0.157 1.018 − 0.103