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Calibration Challenges for Future Radio Telescopes
Stefan J. Wijnholds, Sebastiaan van der Tol, Ronald Nijboer +1
Instruments for radio astronomical observations have come a long way. While the first telescopes were based on very large dishes and 2-antenna interferometers, current instruments…
Self-Calibration of Radio Astronomical Arrays With Non-Diagonal Noise Covariance Matrix
Stefan J. Wijnholds, Alle-Jan van der Veen
The radio astronomy community is currently building a number of phased array telescopes. The calibration of these telescopes is hampered by the fact that covariances of signals fro…
Fundamental Imaging Limits of Radio Telescope Arrays
Stefan J. Wijnholds, Alle-Jan van der Veen
The fidelity of radio astronomical images is generally assessed by practical experience, i.e. using rules of thumb, although some aspects and cases have been treated rigorously. In…
Multisource Self-calibration for Sensor Arrays
Stefan J. Wijnholds, Alle-Jan van der Veen
Calibration of a sensor array is more involved if the antennas have direction dependent gains and multiple calibrator sources are simultaneously present. We study this case for a s…