AAS 207th Meeting, 8-12 January 2006
Session 33 Epoch of Reionization: Observing Cosmic HI at 21cm
Poster, Monday, 9:20am-7:00pm, January 9, 2006, Exhibit Hall

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[33.02] Ionospheric Calibration for Low Frequency Arrays

S. Y. Ting (Stanford University), S. S. Doeleman, C. J. Lonsdale, R. J. Cappallo (MIT Haystack Observatory)

The Mileura Widefield Array is a next generation low frequency radio array which will be constructed in a radio-quiet zone in Western Australia. One of its primary goals is to observe signatures of the epoch of reionization. However, such measurements require highly accurate calibration of ionospheric effects to ensure precise removal of known foreground sources. We report on the efficacy of ionospheric calibration algorithms that are tailored to low frequency arrays whose spatial extent is less than the scale size of ionospheric disturbances. We also apply the techniques to simulations of EOR observations to estimate the magnitude and statistical properties of residual errors that will affect EOR measurements.

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