The full VLBI tutorial:

• • Elements of Geodetic and Astrometric Very Long Baseline Interferometry, Version 2025.01.03, 30.1 MB

This is an open tutorial document for educational purposes, e.g., for newcomers to geodetic and astrometric VLBI but also for the specialists wanting to expand their knowledge about topics, which are not in their main focus. The text is supposed to be a living document with changes and additions to be made at reasonable intervals.

• Was ist VLBI? – Eine Kurzanleitung (Deutsch)
• Co je VLBI? – Stručný průvodce. (český)
• Mitä on VLBI? – Pikaopas. (Suomalainen)
• Hva er VLBI? – En hurtigstartguide. (norsk)
• O que é VLBI? – Um guia de início rápido. (português)
• ¿Qué es VLBI? – Guía de inicio rápido. (español)
• Vad är VLBI? – En kort introduktion. (svensk)
• Що таке РНДБ? – Короткий посібник. (українська)

Modeling thermal expansion in geodetic VLBI: The file containing (almost) all necessary radio telescope dimensions (antenna-info.txt) can be found at

Other keywords: Tutorial on VLBI — Tutorial on Geodetic VLBI — Elements of Geodetic VLBI — Elements of Geodetic and Astrometric VLBI — Tutorial on Very Long Baseline Interferometry