The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm

Details The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm

2008-07-25

arxiv.org/abs/0807.4161v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in "IEEE Journal of Selected Topics in Signal Processing"

Scientific paper

10.1109/JSTSP.2008.2005290

We consider a troublesome form of non-isoplanatism in synthesis radio telescopes: non-coplanar baselines. We present a novel interpretation of the non-coplanar baselines effect as being due to differential Fresnel diffraction in the neighborhood of the array antennas. We have developed a new algorithm to deal with this effect. Our new algorithm, which we call "W-projection", has markedly superior performance compared to existing algorithms. At roughly equivalent levels of accuracy, W-projection can be up to an order of magnitude faster than the corresponding facet-based algorithms. Furthermore, the precision of result is not tightly coupled to computing time. W-projection has important consequences for the design and operation of the new generation of radio telescopes operating at centimeter and longer wavelengths.

Affiliated with

Also associated with

No associations

Rating

The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The non-coplanar baselines effect in radio interferometry: The W-Projection algorithm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-326204