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titleThe SPIRIT and SPECS Far-Infrared / Submillimeter Interferometry Missions
Author(eng)John, C.MATHER; David, LEISAWITZ; The, Far-IR, Interferometry, Mission, Study, Working, Group
Author Affiliation(eng)NASA Goddard Space Flight Center; NASA Goddard Space Flight Center; The Far-IR Interferometry Mission Study Working Group
Issue Date2000-12
PublisherInstitute of Space and Astronautical Science
Publication titleThe Institute of Space and Astronautical Science repot. S.P.
Start page219
End page224
Publication date2000-12
AbstractSpace-based far IR/submillimeter (FIR/SMM) interferometry is needed to answerfundamental cosmological questions concerning the development of structure in the Universe andcould also be used to probe nearby objects such as protostars, young planetary systems, anddebris disks in unprecedented detail. We describe concepts for the Space Infrared InterferometricTelescope (SPIRIT) and the Submillimeter Probe of the Evolution of Cosmic Structure (SPECS).Both are imaging and spectral Michelson interferometers operating in the wavelength range ~40-500 μm. The individual light-collecting mirrors are comparable in size and temperature to theHII/L2 primary mirror. SPIRIT, which could be launched in a decade, is built on a deployableboom and has a maximum baseline of ~30-50 m, providing arcsecond resolution in the far-IR.SPECS uses formation flying to attain baseline lengths up to ~1 km, and thus angular resolutioncomparable to that of the Hubble Space Telescope (HST), the Next Generation Space Telescope(NGST), and the Atacama Large Millimeter Array (ALMA). SPIRIT and SPECS would provideaccess to many important cooling and diagnostic spectral lines and to the bulk of the thermalemission from dust, and make observations complementary to those obtained with ALMA andNGST.
Document TypeDepartmental Bulletin Paper
JAXA Category宇宙科学研究所

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