Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979lock.reptq.....&link_type=abstract
Final Report Lockheed Missiles and Space Co., Sunnyvale, CA.
Astronomy and Astrophysics
Astronomy
Extrasolar Planets, Infrared Astronomy, Infrared Interferometers, Spaceborne Astronomy, Apertures, Cost Estimates, Cryogenic Equipment, Feasibility Analysis, Mirrors, Signal To Noise Ratios, Spaceborne Telescopes, Spacecraft Orbits, Weight Analysis
Scientific paper
A sensor system for the direct detection of extrasolar planets from an Earth orbit is evaluated: a spinning, infrared interferometer (IRIS). It is shuttle deployed, free flying, requires no on-orbit assembly and no reservicing over a design life of five years. The sensor concept and the mission objectives are reviewed, and the performance characteristics of a baseline sensor for standard observation conditions are derived. A baseline sensor design is given and the enabling technology discussed. Cost and weight estimates are performed; and a schedule for an IRIS program including technology development and assessment of risk are given. Finally, the sensor is compared with the apodized visual telescope sensor (APOTS) proposed for the same mission. The major conclusions are: that with moderate to strong technology advances, particularly in the fields of long life cryogenics, dynamical control, mirror manufacturing, and optical alignment, the detection of a Jupiter like planet around a Sunlike star at a distance of 30 light years is feasible, with a 3 meter aperture and an observation time of 1 hour. By contrast, major and possibly unlikely breakthroughs in mirror technology are required for APOTS to match this performance.
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