used geoid gr2000g.06

[jasonebox]

Not everywhere, but at NSE, HUM, DY2, CP1, the 2023 geodetic field survey result (cyan circle) (data file link below) has an offset from the single frequency GPS result (red squares), suspect difference results from AWS single frequency GPSm has EGM96 embedded and returns elevation relative to EGM96. JJ@geus.dk understands the issue.

Examples below

https://github.com/GEUS-Glaciology-and-Climate/GCNet_positions/blob/main/data/GNSS%20data/2023/Data_overview_2023.xlsx