Abstract

As of 2019, the International VLBI Service for Geodesy and Astrometry (IVS) has existed for 20 years. This service is the largest and most prominent organization that coordinates international activities in its field, which currently includes approximately 60 radio telescopes located in many countries from all continents. The IVS data center has accumulated more than 18 million observations obtained during more than 17 000 observation sessions, including more than 10 000 short sessions for rapid determination of universal time. This paper follows the dynamics of IVS development based on the statistical processing of the observational array accumulated in the IVS data center for 1979–2018. Statistics for observation years, stations, baselines, and radio sources are given. The evolution of observation statistics and the accuracy of the results obtained from the processing of VLBI observations is considered.

中文翻译：

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国际VLBI大地测量学和占星术服务20年活动结果的统计分析

摘要

截至2019年，国际VLBI大地测量与占星术服务（IVS）已经存在20年了。这项服务是协调该领域国际活动的最大，最杰出的组织，目前包括来自各大洲许多国家的约60台射电望远镜。IVS数据中心在17,000多个观察会议中累计收集了1,800万个观察结果，其中包括10,000多个短期会议，用于快速确定世界时间。本文基于1979-2018年在IVS数据中心中积累的观测阵列的统计处理，追踪了IVS发展的动态。给出了观测年，台站，基线和无线电源的统计信息。