RFI mitigation methods in radio astronomy

Free access article

Issue		A&A Volume 378, Number 1, October IV 2001


Page(s)		327 - 344
Section		Instruments, observational techniques and data processing
DOI		http://dx.doi.org/10.1051/0004-6361:20011166

A&A 378, 327-344 (2001)
DOI: 10.1051/0004-6361:20011166

RFI mitigation methods in radio astronomy

P. A. Fridman and W. A. Baan

ASTRON, Netherlands Foundation for Research in Astronomy, and Westerbork Observatory, Postbus 2, 7990AA Dwingeloo, The Netherlands

(Received 8 June 2001 / Accepted 20 August 2001)

Abstract
Various methods of radio frequency interference (RFI) mitigation methods at radio astronomy telescopes are being considered. Special attention is given to real-time processing algorithms. Computer simulations and observational results are used to describe the applicability of these methods. Best results can be achieved when the RFI mitigation procedures are adapted to the particular radio telescope, the type of observations, and the peculiarities of the RFI environment. A combination of different linear and non-linear methods in the temporal and frequency domains, with and without the use of reference antennas, may give considerable suppression of strong RFI.

Key words: techniques: interferometric, miscellaneous -- methods: statistical, numerical, miscellaneous

Offprint request: P. A. Fridman, fridman@astron.nl

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