At your location there are multiple 2-3 story building right next to your rover and base.
You should move away from tall buildings and obstruction that will block your skyview at low angle and possible multipath.
Working that close to a building might challenge the accuracy, base/rover should not be that close to a wall.
I am confidente that you will get a satisfying result in a more open area.
Just did a test with the new settings. Base is now on Static.
I moved the position from the base and the rover. Now 20 meters away from any building.
Increased height of 3 meters from ground level.
Steel plate of 1 m2 underneath both base and rover.
Clear sky, no clouds.
Both rover and base are on a fixed position.
Can not get fix.
AR Validation ratio is 1.5 at tops.
Age of differential is 1.1
Baseline changes ± 10 meter
i’ve tried with different satellites
Checking google maps for your location, can you get your base up on the roof of 1 of the buildings?
Also beware that some of the machinery in the factory can cause noise on the GNSS frequency bands. Been there, done that also with a factory, on their roof.