I am trying to process my first project
using Locus. I have 2 known SPC monuments, setting 6 more points at maximum of 3.5 miles from base. Ran a manual traverse for comparison. I have done the Locus sessions twice, 2 different days. The points nearest my base fit fine. My southerly points are off by 500' to east and 1000' too far south. Re-checked traverese, had Bill Martin check my GPS data... What am I
doing wrong? Help!!!

I assume you are using SPC, meters as units, Geoid 99 and orthometric heights.
When all data is loaded into project, go to "control sites" tab and enter the known coordinates for your control. Again, I am assuming this is good control, like published NGS quality.
Now, while you are still in the control sites tab, fix one of the known sites as horizontal, vertical also if that is known. It's an either/or situation. Fix just one horizontally and vertically one horizontal and the other vertical. Leave the other one that you have as a known as "none" in the fixed status.
In the "settings" tab, set the "vector scaling factor" to 1. Now, back in the project select run, processs, all. Once that is done, check your "control tie" tab, and see how much you missed the other "known" point. If it is "good control" then you should be real real close. At least thats been my experience.
If it is very close, then you run the "constrained adjustment". Hold both points fixed and run "adjust". Look at the dialogue. If it fails the chi square test it will give you a number, the "standard error of unit weight". Should be somewhere around 1-2. If something like 30, you got problems.
Anyway, take that number and going back to "settings" change the "vector scaling" bit from 1 to that number. Go back into the project, hit F-7 to adjust again. Look at the standard error of unit weight again, and if it passes the chi square test. Sometimes it is almost like slope staking, it is an iteration.
I'd make sure nothing fails the tau test, the notes from the observations are right, and if you used a slant height that the antenna offset is 0.10 m. Even after everything appears good, go ack and check the observation data, as very rarely have I seen that somehow the antenna offset changed to 0.
Hope this helps, give us more info about your progress, and if you should happen to get frustrated don't think you are the first! This is the best place you could pose a question, and I'm sure a lot of us will be happy to help you out.

Thanks for the response, Dave. Will give it another try today.

Dave: The problem was a 9° blunder by me in computing the manual traverse! The GPS Locus data was correct, I screwed up!! I love Locus!
Fred

love good news like that!

Enjoy your Locus'.