Among the continuous (CONT) campaigns of very long baseline interferometry (VLBI), CONT17 is a special CONT campaign which comprises three independent networks: two legacy networks, and one VGOS network to mainly check possible biases in network geometry. In this study, we estimate all types of geodetic parameters (station and source coordinates, and Earth orientation parameters (EOP)) within the single networks and compare them to investigate potential network dependent biases. Since the separate networks are technically linked to each other by common parameters, i.e. EOP and common radio source coordinates, they can be regarded as a single network on the Earth and integrated in one common adjustment. Thus, we also estimate the station and source coordinates, and the EOP from the integrated networks and compare them with those of the single networks to check the impact on the geodetic parameters. There are both subtle and large biases (up to 7.1 mm between the legacy networks in the Ty component and 23.3 mm between the legacy and VGOS networks in the \(D_3\) component on the surface of the Earth) between the single networks depending on parameter types. The integrated network eventually compensates those differences. Adding the VGOS network to the legacy networks does not show any significant improvement for the latter. However, the integration can provide the VGOS network with better parameter estimates which is important for the new stations.

在超长基线干涉测量 (VLBI) 的连续 (CONT) 活动中，CONT17 是一个特殊的 CONT 活动，包括三个独立的网络：两个遗留网络和一个 VGOS 网络，主要检查网络几何中可能存在的偏差。在这项研究中，我们估计了单个网络中所有类型的大地测量参数（站和源坐标，以及地球方向参数 (EOP)），并比较它们以调查潜在的网络相关偏差。由于单独的网络在技术上通过共同的参数（即EOP和共同的无线电源坐标）相互连接，因此可以将它们视为地球上的单个网络并集成在一个共同的调整中。因此，我们还估计了台站和源坐标，和综合网络的 EOP，并将它们与单个网络的 EOP 进行比较，以检查对大地参数的影响。既有细微的偏差，也有很大的偏差（Ty 组件中的传统网络之间高达 7.1 毫米，而传统网络和 VGOS 网络之间的偏差高达 23.3 毫米）\(D_3\)组件）在单个网络之间，具体取决于参数类型。集成网络最终弥补了这些差异。将 VGOS 网络添加到传统网络并没有显示出对后者的任何显着改进。然而，集成可以为 VGOS 网络提供更好的参数估计，这对新站很重要。