A dataset of VGOS-INT-A enhanced observation data solution for dUT1(2024)

VGOS-INT-A (VLBI Global Observing System Intensive Session Type A) is an intensive observation mode optimized for rapid measurement of high-precision UT1-UTC (Earth Rotation Parameters). Its technical architecture and implementation strategy fully reflect the progressiveness of VLBI technology in the field of maintaining the earth reference framework. This mode constructs an observation network by selecting global ultra long baselines (such as the east-west baseline composed of the Kokee 12m antenna in Hawaii and the Wettzell 13S antenna in Germany, with a physical span of about 11000 kilometers), significantly reducing the sensitivity of the Earth's rotation to time delay observations by utilizing the geometric advantages of cross hemisphere baselines. At the same time, it combines broadband multi band signal reception technology (2-14 GHz dual polarization S/X/Ku band) and a 16 Gbit/s ultra high speed recording system (MARK 6 data logger combined with CDAS2 acquisition terminal) to achieve nanosecond level time delay measurement accuracy. Based on the VLBI observation data obtained from the VGOS system, establish the "2024 VGOS-INT-A dataset for calculating the Earth's rotation parameters (UT1-UTC)" to provide data support for the subsequent rapid production of Earth's rotation parameters and lay the foundation for the application of the resulting products.

VGOS-INT-A（甚长基线干涉测量全球观测系统A型密集观测时段，VLBI Global Observing System Intensive Session Type A）是一种专为快速高精度测量UT1-UTC（地球自转参数，Earth Rotation Parameters）优化的密集观测模式。其技术架构与实施策略充分体现了甚长基线干涉测量（Very Long Baseline Interferometry，VLBI）技术在维持地球参考框架领域的先进性。该模式通过选取全球超长基线构建观测网络，例如由夏威夷科基（Kokee）12米天线与德国韦茨勒（Wettzell）13S天线组成的东西向基线，其物理跨度约达11000公里；并利用跨半球基线的几何优势，显著降低了地球自转对时延观测的敏感度。与此同时，该模式结合宽带多频段信号接收技术（2-14 GHz双极化S/X/Ku频段）与16 Gbit/s超高速记录系统（MARK 6数据记录仪搭配CDAS2采集终端），实现了纳秒级时延测量精度。基于VGOS系统获取的VLBI观测数据，本数据集构建为"2024 VGOS-INT-A dataset for calculating the Earth's rotation parameters (UT1-UTC)"，可为后续快速解算地球自转参数提供数据支撑，并为衍生产品的应用奠定基础。

搜集汇总

背景与挑战

背景概述

该数据集是2024年发布的VGOS-INT-A增强观测数据解决方案，专门用于高精度地球自转参数UT1-UTC的计算。它利用全球超长基线观测网络和先进宽带多频段技术，实现纳秒级时间延迟测量，旨在支持地球自转参数的快速生成和应用基础。