How Do I check The accuracy of Tiny RTK gps

1)I have a rtk float showing on my screen for rtk fix

  1. I want to see how accurately can tiny rtk gps show its position …can you please help me how do I do this

I suppose you could display, via u-center, the graph showing the position deviations in concentric circles, across time. With RTK on, you should observe a centimetric deviation, while without RTK you should observe a few meters deviation.