If my rtk correction comes from a spot too far away, the correction given by two emlids base/rover are valid or not because of the distance too high from the network base station?
You will get degraded corrections from a base the further it is away from your receiver, our rule of thumb is you will add around an additional half inch of error per 6 miles from your base. So depending on the distance it may be out of your tolerance as far as your absolute accuracy, but your relative accuracy from your base with your rover will still be cm level. This video touches on those concepts if you need some clarification: e38surveysolutions.com/pages/gnss-simplified-for-beginners
If my rtk correction comes from a spot too far away, the correction given by two emlids base/rover are valid or not because of the distance too high from the network base station?
You will get degraded corrections from a base the further it is away from your receiver, our rule of thumb is you will add around an additional half inch of error per 6 miles from your base. So depending on the distance it may be out of your tolerance as far as your absolute accuracy, but your relative accuracy from your base with your rover will still be cm level.
This video touches on those concepts if you need some clarification: e38surveysolutions.com/pages/gnss-simplified-for-beginners
What tablet is that?
That's our Vivid tablet: e38surveysolutions.com/collections/survey-accessories/products/vivid-tablet