Lever Arm Refinement Trouble

We are processing our first datasets and getting fully processed PPK datasets with one exception. The lever arm is not refining. The initial and processed results are 0,0,0. Any thoughts on why this might be?

What are you using as a base station (RINEX) file. Likely this has to do with it not being able to use your RINEX to get an accurate enough location for processing.

We had some issues with our base and as a last resort we pulled the CORS and smartnet RINEX. I believe that the base stations were too far away. It looks like once you get more 20 miles from the base this is to be expected.

You are correct. Without a close proximity base station you will encounter vertical separations and data inconsistencies.