Radio telescope dimensions for geodetic and astrometric VLBI thermal expansion modeling

Description

The dataset contains the dimensions of structural parts of radio telescopes used for geodetic and astrometric VLBI for the purpose of thermal expansion modeling in geodetic and astrometric VLBI Level-2 data analysis. New version as of 2025-10-26.

Changes

Only format corrections and deletion of duplicate entry (WIDE85_3)

Context and methodology

The dataset  belongs to publication: Axel Nothnagel (2009) Conventions on thermal expansion modelling of radio telescopes for geodetic and astrometric VLBI; Journal of Geodesy, Vol. 83(3), 787-792, DOI: 10.1007/s00190-008-0284-z, where the general concept of thermal expansion modeling is described.

The data was collected from on-site personnel who measured the dimensions of the structural parts or extracted them from construction drawings.

Technical details

The data is stored in fixed format ASCII, with the data of each telescope in a single line. The format is described in the header of the file. 

No special software is needed to read and use the data.

数据集说明
本数据集收录了用于大地测量与天体测量甚长基线干涉测量（Very Long Baseline Interferometry, VLBI）的射电望远镜结构部件尺寸数据，用于大地测量与天体测量VLBI Level-2数据分析中的热膨胀建模。2025-02-21版本为适配ITRF2020-u2025的2025-01-21版本前置版本。

背景与方法
本数据集源自以下学术出版物：Axel Nothnagel（2009）《用于大地测量与天体测量VLBI的射电望远镜热膨胀建模规范》，载于《大地测量学报（Journal of Geodesy）》第83卷第3期，第787-792页，DOI：10.1007/s00190-008-0284-z，该文献阐述了热膨胀建模的通用概念。
本数据集的数据由现场工作人员通过实测射电望远镜结构部件尺寸，或从施工图纸中提取相关参数获取。

技术细节
数据采用固定格式ASCII存储，每台望远镜的对应数据独占一行。文件头部已对该格式进行说明，无需专用软件即可读取和使用本数据集。