ISIS: Image reconstruction experiments and comparison of various array configurations

Details ISIS: Image reconstruction experiments and comparison of various array configurations ISIS: Image reconstruction experiments and comparison of various array configurations

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.273...41r&link_type=abstract

In ESA, ESA Workshop on Optical Interferometry in Space p 41-43 (SEE N88-10613 01-74)

Astronomy and Astrophysics

Astronomy

Image Reconstruction, Interferometry, Spaceborne Astronomy, Synthetic Arrays, Photons, Signal To Noise Ratios, Spaceborne Telescopes, Speckle Patterns

Scientific paper

The application of speckle masking (triple correlation processing) to coherent, telescope arrays in space is introduced. True diffraction-limited images are obtained since speckle masking is the solution of the phase problem in speckle interferometry. For example, a 14 m array can yield a resolution of 0.004 arcsec at 200 nm wavelength. Resolution of 0.000001 arcsec can be obtained with a 40 km array at 200nm. Computer simulations of optical aperture synthesis by speckle masking are shown. Simulations of a two-dimensional ring-shaped array and of a linear one-dimensional array are described. The dependence of the signal-to-noise ratio in the reconstructed image on photon noise is discussed.

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