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Table 2 Statistics of the differences between the observation elevations and the SRTM3arc [Unit: (m)]

From: A high-resolution gravimetric quasigeoid model for Vietnam

Data Mean STD Min Max
GNSS/levelling (812 points) − 3.13 6.86 − 50.13 32.94
VIGAC data (10,940 points) − 4.23 23.46 − 403.20 434.95
IGP data (all: 19,267 points) − 14.95 73.50 − 789.00 715.46
Rejected points of IGP data (1960 points) − 57.97 171.68 − 782.32 715.46
Accepted points of IGP data (17,307 points) − 10.08 49.42 − 789.00 491.80