This is a feature. ANTENNA DELTA eccentricities are from the survey marker to the antenna reference point (ARP, normally the bottom of the antenna) -- that's because of the antenna mount in your case. PCV ANTEX offsets are from the ARP to the antenna phase center (APC, normally inside the body of the antenna) -- it varies with the antenna model. The intended usage is so that the marker coordinates won't change if you mix and match different antenna mounts and antenna models. -F.
Hello everyone, > I'm using the post-processing module RTKPOST of RTKLib software (ver. > 2.4.2, patch 11) with dual frequency GNSS RINEX files, and I noticed a > small problem regarding the settings of the base station coordinates in > static > mode. > > In the "Positions" > "Base Station" window, when I select the "RINEX > Header Position" coordinates (that in my files are the precise coordinates > of the base station in ETRS89 reference system), the software sums these > two RINEX fields: "APPROX POSITION XYZ" + "ANTENNA: DELTA H/E/N" > > Unfortunately, if I also use antenna PCV ANTEX files, the "ANTENNA: > DELTA H/E/N" values are added again during the processing, so my final > rover position has an offset equal to the "ANTENNA: DELTA H/E/N" values. > > Since usually the "ANTENNA: DELTA H/E/N" values are equal to zero, > this problem is difficult to be found. But our antennas have a small offset > (few cms) due to a SCIGN leveling mount like this one: > > https://www.unavco.org/projects/project-support/gnss-support/permanent-station/equipment/mounts/scignmount.html > > The solution of my problem is to manually insert the XYZ coordinates of > the base station. But I find very useful the "RINEX Header position" > option... > > Did I do something wrong? > Do you have the same problem? > > If you confirm my problem, I will wrote to the software developer to > report the bug. > >
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