set both receivers up level on a board fence. Get a carpenters level to do it. Let em cook. Then swap receivers. Then opus both observations.?ÿ
Or...find a known point, and see which one is off by 0.25'
May I suggest that you take the static data from all four receivers and submit it to OPUS twice. On the first set put the antenna height to zero. On the second set enter the antenna height to what you used in the field.
Compare to the results you got when you processed the data.
JAC
I am currently experiencing the same problem in TBC. It is the software randomly changing data from ARP to APC. I had the same problem in Magnet 1.0 a very long time ago.
Are you reprocessing the data or just downloading a text file?