ASTRON is responsible for the operations of the 14 dish Westerbork Synthesis Radio Telescope (WSRT) and the Low Frequency Array (LOFAR) which consists of 100.000 small dipoles. ASTRON is also heavily involved in the design and development of the Square Kilometre Array (SKA) which, when built, will be the largest radio telescope in the world.


The Westerbork Synthesis Radio Telescope (WSRT) is a powerful radio telescope that uses a technique called "aperture synthesis" to generate radio images of the sky.


LOFAR (Low Frequency Array) is currently the largest radio telescope operating at the lowest frequencies that can be observed from Earth.

Square Kilometre Array

The Square Kilometre Array will be the most powerful radio telescope in the world. It will enable transformational science that will change our understanding of the Universe.

50 Years Westerbork Radio Observatory

A Continuing Journey to Discoveries and Innovations

History of WSRT

A graphical representation of WSRT's rich and exciting history.

Latest tweets

Daily image of the week

On June 13-17, the LOFAR Family Meeting took place in Cologne. After two years LOFAR researchers could finally meet in person again. The meeting brings together LOFAR users and researchers to share new scientific results.

Our renewed ‘Melkwegpad’ (Milky Way Path) is finished! The new signs have texts in Dutch on the one side and in English on the other side. The signs concerning planets have a small, 3D printed model of that planet in their centre.
#Melkwegpad @RTVDrenthe

Daily image of the week

The background drawing shows how the subband correlator calculates the array correlation matrix. In the upper left the 4 UniBoard2s we used. The two ACM plots in the picture show that the phase differences of the visibilities vary from 0 to 360 degrees.

Daily image of the week: Testing with the Dwingeloo Test Station (DTS)
One of the key specifications of LOFAR2.0 is measuring using the low- and the highband antenna at the same time. For this measurement we used 9 lowband antenna and 3 HBA tiles.