An Experimental setup to develop RFI mitigation techniques for radio astronomy

Astronomy and Astrophysics – Astrophysics

Scientific paper

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To appear in the proceedings of the XXVIIth general assembly of URSI (2005), Delhi; 4 pages, 5 figures

Scientific paper

Increasing levels of Radio Frequency Interference (RFI) are a problem for research in radio astronomy. Various techniques to suppress RFI and extract astronomical signals from data affected by interference are being tried out. However, extracting weak astronomical signals in the spectral region affected by RFI remains a technological challenge. In this paper, we describe the construction of an experimental setup at the Raman Research Institute (RRI), Bangalore, India for research in RFI mitigation. We also present some results of tests done on the data collected using this setup. The experimental setup makes use of the 1.42 GHz receiver system of the 10.4 m telescope at RRI. A new reference antenna, its receiver system and a backend for recording digitized voltage together with the 1.42 GHz receiver system form the experimental setup. We present the results of the characterization of the experimental setup. An off-line adaptive filter was successfully implemented and tested using the data obtained with the experimental setup.

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