Analysis of information sources in references of the Wikipedia article "GLONASS" in English language version.
Figure 2 shows the PDOP improvement in percentage when comparing the GPS-only to the GPS-plus-GLONASS PDOP values. At high latitudes, that is, above 55°, the improvement is at the 30% level.
Figure 2 shows the PDOP improvement in percentage when comparing the GPS-only to the GPS-plus-GLONASS PDOP values. At high latitudes, that is, above 55°, the improvement is at the 30% level.