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Calibrating Height at Ground

Question asked by Austin Heil on Dec 14, 2019
Latest reply on Jan 6, 2020 by Nico Becke

Monday I did a job with GCP's that has already been surveyed by a Trimble R8. The BM that they shot was 979.469 ft on NAD83 (2011). I set the Catalyst to the same in TMM. But I was 111.8 ft off. Has anyone put in a negative number in for the Antenna Height and it work? Or has anyone compared numbers to a calibrated system? 

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