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Radio Interferometric Calibration Using a Complex Student's t-distribution and Wirtinger Derivatives
[article]
2019
arXiv
pre-print
Radio interferometric gain calibration can be biased by incomplete sky models and radio frequency interference, resulting in calibration artefacts that can restrict the dynamic range of the resulting images. It has been suggested that calibration algorithms employing heavy-tailed likelihood functions are less susceptible to this due to their robustness against outliers in the data. We present an algorithm based on a Student's t-distribution which leverages the framework of complex optimisation
arXiv:1910.08136v1
fatcat:znfhtfx27jbnblb5s43jyypi4a