Hi there,
Just wanted to second comments above. As Dave said, the accuracy of the Average Single is about few meters only. To get more accurate position, you need to place the base in one of the following ways:
- On a benchmark with known coordinates
- Get corrections from the NTRIP service and use Average Fix
- Use PPP services or OPUS
If you need the points to be accurate just relative to each other, write down the averaged coordinates of your base and use them in future surveys. It’ll help keep all further measurements consistent.
P.S. Regarding Michael’s words, here is a post that can help you set the base position by choosing the point from the project. That’s also a great way to ensure the data match.