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Wide-Field Imaging

Wide-Field Imaging

Wide-Field Imaging. Michael Bietenholz. Based on a lecture by Rick Perley (NRAO) at the NRAO Synthesis Imaging Workshop. Field-of-View Limited by Antenna Primary Beam. Simplest wide-field problem: source is larger than primary beam

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554 views • 39 slides
Wide-Field Imaging I: Non-Coplanar Visibilities

Wide-Field Imaging I: Non-Coplanar Visibilities

Wide-Field Imaging I: Non-Coplanar Visibilities. Rick Perley. Review: Measurement Equation. From the first lecture, we have a general relation between the complex visibility V(u,v,w), and the sky intensity I ( l , m ):. This equation is valid for:

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345 views • 32 slides
Lecture 17

Lecture 17

Lecture 17. Reprise: dirty beam, dirty image. Sensitivity Wide-band imaging Weighting Uniform vs Natural Tapering De Villiers weighting Briggs-like schemes. Reprise: dirty beam, dirty image. Fourier inversion of V times the sampling function S gives the dirty image I D :

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447 views • 30 slides
Deconvolution and Multi frequency synthesis

Deconvolution and Multi frequency synthesis

Deconvolution and Multi frequency synthesis. Bob Sault. Deconvolution. Basics (again!) Multi-frequency synthesis Characteristics of the dirty beam Linear deconvolution Constraints CLEAN Maximum entropy Restoration Multi-frequency deconvolution. An example of deconvolution.

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313 views • 30 slides
Deconvolution and Multi frequency synthesis

Deconvolution and Multi frequency synthesis

Deconvolution and Multi frequency synthesis. Bob Sault. Deconvolution. Basics (again!) Multi-frequency synthesis Characteristics of the dirty beam Linear deconvolution Constraints CLEAN Maximum entropy Restoration Multi-frequency deconvolution. An example of deconvolution.

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296 views • 28 slides
Lecture 14

Lecture 14

Lecture 14. Reprise: dirty beam, dirty image. Sensitivity Wide-band imaging Weighting Uniform vs Natural Tapering De Villiers weighting Briggs-like schemes. Reprise: dirty beam, dirty image. Fourier inversion of V times the sampling function S gives the dirty image I D :

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265 views • 25 slides

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