%0 Generic %1 adari2021generalized %A Adari, Prakruth %A Slosar, Anže %D 2021 %K library %T Generalized Redundant Calibration of Radio Inteferferometers %U http://arxiv.org/abs/2107.10186 %X Redundant calibration is a technique in radio astronomy that allows calibration of radio arrays, whose antennas lie on a lattice by exploiting the fact that redundant baselines should see the same sky signal. Because the number of measured visibilities scales quadratically with the number of antennas, but the number of unknowns describing the individual antenna responses and the available information about the sky scale only linearly with the array size, the problem is always over-constrained as long as the array is big and dense enough. This is true even for non-lattice array configurations. In this work we study a generalized algorithm in which a per-antenna gain is replaced with a number of gains. We show that it can successfully describe data from an approximately redundant array on square lattice with pointing and geometry errors. We discuss the parameterization, limitations and possible extensions of this algorithm.

@misc{adari2021generalized, abstract = {Redundant calibration is a technique in radio astronomy that allows calibration of radio arrays, whose antennas lie on a lattice by exploiting the fact that redundant baselines should see the same sky signal. Because the number of measured visibilities scales quadratically with the number of antennas, but the number of unknowns describing the individual antenna responses and the available information about the sky scale only linearly with the array size, the problem is always over-constrained as long as the array is big and dense enough. This is true even for non-lattice array configurations. In this work we study a generalized algorithm in which a per-antenna gain is replaced with a number of gains. We show that it can successfully describe data from an approximately redundant array on square lattice with pointing and geometry errors. We discuss the parameterization, limitations and possible extensions of this algorithm.}, added-at = {2021-07-22T07:42:35.000+0200}, author = {Adari, Prakruth and Slosar, Anže}, biburl = {https://www.bibsonomy.org/bibtex/2c9e340f1c808cd29bbcee49340e34c5a/gpkulkarni}, description = {Generalized Redundant Calibration of Radio Inteferferometers}, interhash = {2961325b058b765b829c77234ec7fa05}, intrahash = {c9e340f1c808cd29bbcee49340e34c5a}, keywords = {library}, note = {cite arxiv:2107.10186}, timestamp = {2021-07-22T07:42:35.000+0200}, title = {Generalized Redundant Calibration of Radio Inteferferometers}, url = {http://arxiv.org/abs/2107.10186}, year = 2021 }