Possibly the z3801 reports heigh as MSL, whereas the UCCM use some other reference frame.
Ole On Tue, Dec 20, 2016 at 7:28 AM, Tom Curlee <[email protected]> wrote: > A couple of questions: > I've just started using LH 5.0 with my 2 GPSDO units (Thanks Mark!) - a > Trimble UCCM and a Z3801A. Oddly, I'm very getting different survey > altitude values. The Z3801A is around 81 M, which agrees within 1 or 2 > meters with Google maps (not a perfect source, but close), but the UCCM is > usually around 48M to 53M depending on which survey I want to believe. > Both receivers are locked and both are fed off the same antenna through a > splitter. I admit that the antenna placement is very poor - anything below > 60 degrees elevation to the north is blocked (LH is great for antenna > placement analysis). Anyone have any ideas? > A question on LH usage. When the UCCM is in the position hold mode, what > happens when a precision survey is run? Looking at the .lla file shows > that every position, including the final processed location, is the same > as that shown as the position hold location on the main LH screen. Do you > need to take the receiver out of the hold mode to run a precision survey? > How? How is the position scatter plot used with a survey? I usually don't > see any positions plotted, certainly not when running a precision survey. > I think I saw data plotted when I did an internal survey. > Many thanks for any info. And thanks again to Mark and John for all the > work. > Tom > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
