Problem processing static survey from Topcon GPS
I am having some difficulty doing static surveys with some older Topcon receivers, Hiper Plus and Legacy E with PGA-1 antenna. I am recording static data using Topcon receiver utility (TRU) on 2 data collectors as I don’t have onboard recording activated on the receivers. TRU allows me to enter antenna height slant or not. I am post processing using Topcon Tools but have tested with GNSS solutions also.
I seem to be getting a fairly consistent vertical error of 30mm on known points and benchmarks. Horizontal is fine. Now I am fairly sure this is a problem with the antenna heights, as the 30mm would cover the difference between slant and vertical, or antenna phase center. The thing is the heights seem to be right in the RINEX and tps files and also in Topcon tools. All rod heights have been checked and are correct. Is it possible the error is being created in TRU somehow?
Does anyone have any insight into this?
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