SP80 Elevation Error
We're running SP-80s with Survey Pro on Ranger 3s, and keep having an elevation problem. A check with the RTK rover gives us a cut (always about 0.3'). We can't find a setting in either the rover or that data collector that would produce a 0.3' rod-height offset. Only solution so far has been to delete the GPS receiver profile from the data collector and re-enter it. Ran into a similar problem while running 2 rovers off the same base; the guy who started the base checked in fine with his rover on a known point, but the 2nd guy's rover would have the same +/- 0.3' elevation error. Solved that by having both guys start the base, then their rover. Seems likely that the issues are related. Anyone else run into this problem? Know a solution?
I don't know the equipment, but wonder if somehow they end up using different geoid models that might differ by that much.
Sounds to me like the erroneous rover is getting a phase center coordinate over the radio and treating it like a position at the ARP.
In the two rover scenario above, did the second guy have the base point in his collector as a control point? If so I'd do a test where the base point isn't present in the rover. I don't know Survey Pro, but it seems like a logical test.