Improving the Murchison Widefield Array tile model for polarimetry

Improving the Murchison Widefield Array tile model for polarimetry

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...

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Bibliographic Details
Main Authors: Sutinjo, Adrian, Padhi, Shantanu, Wayth, Randall, Hall, Peter, Tingay, Steven, O’Sullivan, J., Lenc, E.
Other Authors: -
Format: Conference Paper
Published: IEEE Computer Society 2014
Online Access:http://hdl.handle.net/20.500.11937/29327
Description
Summary: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.

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