In connection with the work for the next generation VLBI2010 Global Observing System (VGOS) of the International VLBI Service for Geodesy and Astrometry, a new scheduling package (Vie_Sched) has been developed at the Vienna University of Technology as a part of the Vienna VLBI Software. In addition to the classical station-based approach it is equipped with a new scheduling strategy based on the radio sources to be observed. We introduce different configurations of source-based scheduling options and investigate the implications on present and future VLBI2010 geodetic schedules. By comparison to existing VLBI schedules of the continuous campaign CONT11, we find that the source-based approach with two sources has a performance similar to the station-based approach in terms of number of observations, sky coverage, and geodetic parameters. For an artificial 16 station VLBI2010 network, the source-based approach with four sources provides an improved distribution of source observations on the celestial sphere. Monte Carlo simulations yield slightly better repeatabilities of station coordinates with the source-based approach with two sources or four sources than the classical strategy. The new VLBI scheduling software with its alternative scheduling strategy offers a promising option with respect to applications of the VGOS.

中文翻译：

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新的 VLBI2010 调度策略和对地面参考系的影响

与国际大地测量和天体测量服务的下一代 VLBI2010 全球观测系统 (VGOS) 的工作相关，维也纳科技大学开发了一个新的调度包 (Vie_Sched)，作为维也纳 VLBI 软件的一部分. 除了经典的基于站的方法外，它还配备了基于要观察的无线电源的新调度策略。我们介绍了基于源的调度选项的不同配置，并研究了对当前和未来 VLBI2010 大地测量调度的影响。通过与现有的连续运动 CONT11 的 VLBI 计划进行比较，我们发现具有两个源的基于源的方法在观测数量、天空覆盖和大地参数方面与基于站的方法具有相似的性能。对于一个人工的 16 站 VLBI2010 网络，基于源的四个源方法提供了天球上源观测的改进分布。与经典策略相比，使用两个源或四个源的基于源的方法，蒙特卡罗模拟产生的台站坐标可重复性略好。新的 VLBI 调度软件及其替代调度策略为 VGOS 的应用提供了一个有前景的选择。