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Improving the Murchison Widefield Array tile model for polarimetry

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Open access
Authors
Sutinjo, Adrian
Padhi, Shantanu
Wayth, Randall
Hall, Peter
Tingay, Steven
O’Sullivan, J.
Lenc, E.
Date
2014
Type
Conference Paper

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Sutinjo, A. and Padhi, S. and Wayth, R. and Hall, P. and Tingay, S. and O’Sullivan, J. and Lenc, E. 2014. Improving the Murchison Widefield Array tile model for polarimetry, in Proceedings of 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM 2014), Jul 13 2014, pp. 1-2. Victoria, BC; Canada: IEEE Computer Society.
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International Symposium on Antenna Technology and Applied Electromagnetics
Source Conference
Proceedings - ANTEM 2014: 2014 16th International Symposium on Antenna Technology and Applied Electromagnetics
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Curtin Institute of Radio Astronomy
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Abstract

This paper summarizes the progress to date in improving the Murchison Widefield Array’s (MWA) “tile” model for polarimetry. A simple model that accounts for inter-element mutual coupling is presented which explains the false polarization leakage in Stokes Q (“false Q”) seen when the array is scanned away from zenith in the principal planes. On these planes the model predicts current imbalance in the X (E-W) and Y (N-S) dipoles and hence the false Q. More sophisticated models intended to calibrate actual observation data will be briefly discussed.