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Calibration of modern Earth rotation aperture synthesis

Final Activity Report Summary - CAMERAS (Calibration of modern earth rotation aperture synthesis)

The project 'Calibration of modern earth rotation aperture synthesis' (CAMERAS) was geared toward expanding the knowledge of earth rotation synthesis, the method by which the signals of an array of single small radio telescopes are used to produce radio images of the sky as if observed with a single very large radio telescope toward new, large radio telescopes that use new technologies. One such example is the 'Low frequency array' (LOFAR), a low frequency radio telescope which is being constructed in the Netherlands and Germany, a forerunner of the 'Square kilometre array', the next generation radio telescope to be constructed in the next decade.

The main objective of the project was to bring expert knowledge to the team of people developing methods and software to calibrate and process LOFAR data, taking into account the complex geometry of the telescope and the effects of disturbing factors such as the ionosphere which distorts the incoming wavefronts. This has been accomplished by bringing one of the few world experts in this area, Prof. W.N. Brouw back to the Netherlands and getting him deeply involved into the software development for LOFAR and let him provide advice and support for the people involved in LOFAR calibration and software developments. This aspect of the project has been fulfilled actively with very good results.

In addition Prof. Brouw has been heavily involved in various international projects profiting from his expertise: the Square Kilometre Array, several review committees,including the LOAR CDR, and involvement in the IAU Standards of Fundamental Astronomy working group. These efforts have been part of the aspect of dissemination of expert knowledge throughout the astronomical community.