I am wondering if there are any other users out there with a Spectra SP80 GNSS receiver having issues with elevations in their survey data. We are adjusting to a published benchmark elevation after running our Static over said benchmark for 20-30 minutes as a standalone survey and are tying down project control with both our Total Station and GPS receiver as well as running level loops over our initial control to establish elevations for the total station points. Overall, our projects look fine but in some sections that have clear visibility overhead and are fairly open spaces, we are getting shots that will show up to a 0.30' elevation difference from shots taken with the total station. I am stumped as to what the issue may be as it is not a consistent problem on every job and we are careful with the equipment ensuring we take a few seconds at each shot to allow the GPS to establish good location. Any help would be appreciated! We are located in Southern California and work mostly in the LA and Orange County area for reference. We are also connecting to base stations with a MiFi jetpack and the CRTN service through UCSD.