The University of Stellenbosch has appointed Stefan J. Wijnholds as Extraordinary Associate Professor. The appointment letter states that "the University created this category of appointments to give recognition to individuals for their proven specialized expertise and / or eminence in their profession and field of study, and to involve them in the academic programmes of the relevant Department."

Published by the editorial team, 27 September 2016

Supported by travel funds from the EC FP7 MIDprep programme, Stefan visited the research group of SKA Research Chair Prof. David B. Davidson in the Department of Electrical and Electronic Engineering several times over the last few years. His expertise in radio astronomical array signal processing and phased array system design proved to form a nice complement to the knowledge on antenna systems and electromagnetic modelling of the research group at the University of Stellenbosch. This led to constructive involvement of Stefan in a number of ongoing projects at the University of Stellenbosch.

This appointment formalizes this fruitful collaboration and will strengthen the ties between ASTRON and the University of Stellenbosch in the context of the SKA.


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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

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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.