Achievable Positioning Accuracies in a Network of GNSS Reference Stations - Global Navigation Satellite Systems: Signal,Theory and Applications - page 210

RINEX files, in fact, are generated interpolating the error model estimated by the network
software. When the inter-station distances grows up, a positioning quality deterioration is
expected, due to the approximations made in the interpolation process of a wider area. The
Fig. 16, that shows the results obtained using a VRS RINEX file as master, confirms what
was expected.
Fig. 16. Positioning quality of a geodetic receiver after the post-processing with the VRS.
CDF of the planimetric (left) and altimetric (right) error using static time sessions of 5 (top)
and 10 (bottom) minutes
It is easy to note that the VRS post-processing positioning improves the planimetric and
altimetric accuracy only in the case of small- (“red”) and medium-sized (“green”) networks
(about 1 cm and 4 cms respectively, considering the planimetric error).
These results confirm the goodness of this product when GNSS permanent stations, far each
other about 50-100 kms, are used. When these distances exceed 100 kms, the positioning
quality is comparable, or even worse, with the one obtained using the nearest reference
station as master.
The percentage of fixed ambiguities is about 100% of the epochs considering 5 minutes or 10
minutes long files in “red” network, while it is very low for “green” (50%) and “blue” (12%)
networks.