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Table 3 Normalized dUT1 repeatability for the 18 + 1 network showing the importance of individually optimized weight factor combinations for each network geometry

From: Optimal antenna locations of the VLBI Global Observing System for the estimation of Earth orientation parameters

Best parametersTraining antenna position
p1p2p3p4p5p6p7
\(\vec {\omega }_{p1,{\text{dUT}}1}\)1.001.171.261.191.031.251.46
\(\vec {\omega }_{p2,{\text{dUT}}1}\)1.121.001.361.081.121.231.28
\(\vec {\omega }_{p3,{\text{dUT}}1}\)1.101.711.001.211.211.261.15
\(\vec {\omega }_{p4,{\text{dUT}}1}\)1.421.381.191.001.191.231.22
\(\vec {\omega }_{p5,{\text{dUT}}1}\)1.571.361.301.371.001.661.37
\(\vec {\omega }_{p6,{\text{dUT}}1}\)1.401.341.481.371.281.001.04
\(\vec {\omega }_{p7,{\text{dUT}}1}\)1.091.381.211.031.381.091.00
  1. Similar results can be seen for the 6 + 1 and 12 + 1 networks and all EOP. Values larger than 1.00 indicate how much the results degrade when not using the optimum weighting scheme for a particular training antenna position