Image Formation from Coherence Functions in Astronomy: Proceedings of IAU Colloquium No. 49 on the Formation of Images from Spatial Coherence Functions in Astronomy, Held at Groningen, The Netherlands, 10–12 August 1978

Front Matter....Pages i-xi
Front Matter....Pages 1-1
Fundamentals and Deficiencies of Aperture Synthesis....Pages 3-18
The Two Dimensional Representation Of Three Dimensional Interferometer Measurements....Pages 19-26
Measurement Errors in Rotational Synthesis and their Effects in the Map Plane....Pages 27-45
“Kneading”: The Adjustment of Instrumental Phase and Gain Parameters to Suppress Error Patterns in a Synthesis Map....Pages 47-53
A Proposal to Obtain Short Spacing Information by Interpolation....Pages 55-58
The Short Spacings Problem in Correlation Interferometers and a Procedure for Solving It....Pages 59-59
Short Spacing Synthesis from a Primary Beam Scanned Interferometer....Pages 61-63
Front Matter....Pages 65-65
Fundamental Aspects of Aperture Synthesis with Limited or No Phase Information....Pages 67-82
Map Making with Non-Phase Stable Interferometers....Pages 83-91
Image Reconstruction from VLBI Amplitude and Phase Closure Data....Pages 93-93
On the Danger of Applying Statistical Reconstruction Methods in the Case of Missing Phase Information....Pages 95-101
Reduction of Phase Noise in Interferometry with State-Space Analysis....Pages 103-110
Front Matter....Pages 111-111
Digital Processing Methods for Aperture Synthesis Observations....Pages 113-120
Digital Hardware Processing of Rotational Synthesis Data....Pages 121-121
Analogue Processing Methods for Synthesis Observations....Pages 123-141
Exploring Methods of Effective Data Display in an Interactive Astronomical Data-Processing Environment....Pages 143-155
Processing and Display of Spectral Line Absorption Maps....Pages 157-157
A Proposed Correlator Back-End ror the Culgoora Radioheliograph....Pages 159-164
An Acousto-Optical Image Processor and its Application to a 160 Mhz Interferometer....Pages 165-172
Front Matter....Pages 173-173
Imaging with a Coherence Interferometer in Optical Astronomy....Pages 175-185
Front Matter....Pages 173-173
Towards Imaging of Star Clusters by Speckle Interferometry....Pages 187-193
Front Matter....Pages 195-195
Resolution Enhancement; the “Maximum Entropy Method” and the “High Resolution Method”....Pages 197-218
The Maximum Entropy Method....Pages 219-225
The Use of Bayesian Statistics in Image Estimation from Interferometer Data....Pages 227-234
Problems with Maximum Entropy....Pages 235-235
The Introduction of a Priori Knowledge in Certain Processing Algorithms....Pages 237-239
Extending the Fourier Transform — The Positivity Constraint....Pages 241-247
The Information of Images and its Dependence on Noise and Spatial Resolution....Pages 249-255
Maximum Entropy Spectral Analysis — Some Comments....Pages 257-257
Front Matter....Pages 259-259
The Method ‘Clean’ — Use, Misuse and Variations....Pages 261-275
Fitting a Gaussian Model to Aperture Synthesis Data by Akaike’s Information Criterion (AIC)....Pages 277-286
An Optimum Deconvolution Method....Pages 287-290
Application of the Simplex Algorithm to Image Restoration....Pages 291-291
Observations of Extended Radio Sources using a Multiple-Beam Technique....Pages 293-298
Formation of Acoustic Images from Spatial Coherence Functions: Processing by Superresulotion Techniques....Pages 299-313
Front Matter....Pages 315-315
Reconstruction from Projections in Medicine and Astronomy....Pages 317-325
Back Matter....Pages 327-337