Astrometry and geodesy with Very Long Baseline Interferometry

Jingdong Zhang
Finnish Geospatial Research Institute - National Land Survey of Finland

The aim of my research is to provide accurate and stable spatiotemporal reference frames to society.

High-precision positioning, navigation, and timing are essential for daily life, scientific research, and space missions, all of which fundamentally depend on reliable spatiotemporal reference frames. Very Long Baseline Interferometry (VLBI) is a unique observing technique that measures the positions and motions of both celestial bodies and the Earth using radio telescopes. However, its accuracy is limited by atmosphere turbulence and other systematic errors. My research focuses on the modeling and mitigation of these error sources, based on existing and new, dedicated astrometric and geodetic VLBI observations, as well as self-developed analysis software.

Organisations

Find out the research institutes that implement the Programme and where to find open positions.

Progress

The second kick-off event brought together postdocs who joined the programme at a later stage.
Tulanet logo

Tutkimuslaitosten yhteenliittymä Tulanet

Latokartanonkaari 9
00790 Helsinki

Sanna Marttinen

Toiminnanjohtaja
puh. 029 532 6356
sanna.marttinen@tulanet.fi
© 2026 Tulanet