Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..185d&link_type=abstract
In ESA, Solar Physics Astrophysics at Interferometric Resolution p 185-189 (SEE N93-10901 01-90)
Astronomy and Astrophysics
Astronomy
2
Design Analysis, Image Reconstruction, Interferometry, Solar Physics, High Resolution, Simulation, Solar Instruments, Spaceborne Astronomy, Ultraviolet Telescopes
Scientific paper
Extensive simulations to investigate the image reconstruction potential of the Solar Ultraviolet Network (SUN) were performed. They establish that excellent images are obtained with compact optical arrays despite errors in visibility data caused by photon noise, beam mispointing, and residual phase errors. Imaging fidelity in optical interferometry, with emphasis on extended objects, is a complex function of flux level, source complexity, recombination errors (pointing and phase), and spatial frequency coverage of the so called u,v plane. 'Holes' in the u,v coverage would result in artifacts and in a significant degradation of the quality of the complex and extended images which could be reconstructed from the data. SUN's emphasis on high resolution imaging of an extended field of view (6 by 6 inches) implies that the interferometer has to be compact, i.e., without zeroes in the u,v plane coverage, and controlled to fraction of a wavelength ('cophased'). In these conditions, interferometric imaging quality can be compared to full aperture single dish imaging.
Cornwell Tim J.
Dame Luc
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