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.

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。