Terrestrial Planet Finder space vehicle architecture trades

Details Terrestrial Planet Finder space vehicle architecture trades Terrestrial Planet Finder space vehicle architecture trades

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3350..690w&link_type=abstract

Proc. SPIE Vol. 3350, p. 690-697, Astronomical Interferometry, Robert D. Reasenberg; Ed.

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Scientific paper

THe goal of NASA's Terrestrial PLanet Finder program is to detect Earth-size planets orbiting other stars and evaluate their ability to sustain life. This will be accomplished through spaced-based IR interferometry using baselines much longer than previously flown. This paper presents the technical trades being evaluated by TRW to implement this investigation. Two primary concepts are considered: a single monolithic deployed interferometer with a baseline of up to approximately 100 meters and a free-flying constellation of interferometer components featuring precision station- keeping over baselines of up to several kilometers. Exo- planet detection is best performed at approximately 10 micron wavelength requiring the instrument to operate at cryogenic temperatures to minimize the effects of telescope thermal emissions. Further improvements in sensitivity can be facilitated by flying on a deep space trajectory away from the Sun to reduce zodiacal background emissions. Numerous technical innovations are necessary to enable such a system; however, most of these technologies are being developed by existing programs and there should be no roadblocks to fielding such a terrestrial planet finder in the 2010-2020 time frame.

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