Effect of adaptive interference suppression on radio astronomical image formation

Amir Leshem*, Alle Jan van der Veen

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

The increasing use of the electromagnetic spectrum and the need for more sensitive radio telescopes spures wide interest in adaptive RFI suppression techniques, such as spatial filtering. We study the effect of spatial filtering techniques on radio astronomical image formation. Current deconvolution procedures such as CLEAN are shown to be unsuitable to spatially filtered data, and the necessary corrections are derived. To that end, we reformulate the imaging (deconvolution/calibration) process as a sequential estimation of the locations of astronomical sources. This leads to an extended CLEAN algorithm and gives estimates of the expected image quality and the amount of interference suppression that can be achieved. Some of the effects are shown in simulated images.

Original languageAmerican English
Pages (from-to)341-352
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4015
StatePublished - 2000
Externally publishedYes
EventRadio Telescopes - Munich, Ger
Duration: 27 Mar 200030 Mar 2000

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