OASIS: A mission concept

Details OASIS: A mission concept OASIS: A mission concept

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.273...51n&link_type=abstract

In ESA, ESA Workshop on Optical Interferometry in Space p 51-59 (SEE N88-10613 01-74)

Astronomy and Astrophysics

Astronomy

1

Interferometry, Spaceborne Astronomy, Spaceborne Telescopes, Synthetic Apertures, Image Resolution, Spacecraft Configurations, Synthetic Arrays

Scientific paper

A multiaperture optical interferometer, mounted on a single structure in space is proposed. The design is guided by radio aperture synthesis experience. The essential element is the use of a bright nearby reference object to equalize optical pathlengths in the array during long integrations on faint objects. The instrument has to be operated on an inherently unstable space platform, and the image processing must be done on the ground. Even such a limited instrument has a remarkable performance. An example for a 20m array with 9 telescopes is worked out. A 21st magnitude object is imaged with 5 milliarcsec resolution, spectral resolution of 0.25 nm, and a continuum dynamic range of 1:100.

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