where I live we have a free ntrip correction service by the government, this is the location map: FLEPOS - Sensorkaart
I live at a point roughly in between two nearby bases, both at a distance of 15 km and I use the virtual ‘multiple base’ mountpoint (VRS) they offer, which is assumed to be better than only using the one nearest base (NRS).
So far I was convinced that RTK fix means <2 cm accuracy, no matter how far from a base station you are. However I hear left and right that it is not so simple. Accuracy does vary and in some cases with a far away base RTK fix can be achieved without <2cm guarantee?
If so, can someone give an idea of: the added benefit in terms of fix centimeter accuracy (F9P dual-band all constellations) of:
-a very close-by base station (<1km)
in comparison to
-e.g. a single base at e.g. 15+ km or
-e.g. VRS with multiple bases with a minimum base distance of 15 km?