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  • 1
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    COSMIC: A high resolution, large collecting area telescope (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The spaceborne Coherent Optical System of Modular Imaging Collectors (COSMIC) is presented. It has high angular resolution and can produce images of complex, low-surface-brightness objects such as distant galaxies. If configured as a 36 m filled linear array, COSMIC can have 15 times better angular resolution and 10 times greater collecting area than the Space Telescope. Alternatively, if the collecting area is spread out to create an unfilled two-dimensional array, there is the additional advantage of not needing to rotate the array in order to build up a reconstructed image. Considerations which led to the design concept, scientific goals, and the potentially useful role of a space station for assembly are discussed.
    Keywords: ASTRONOMY
    Type: ESA Colloq. on Kilometric Opt. Arrays in Space; p 43-48
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Test results of Spacelab 2 infrared telescope focal plane (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The small helium cooled infrared telescope for Spacelab 2 is designed for sensitive mapping of extended, low-surface-brightness celestial sources as well as highly sensitive investigations of the shuttle contamination environment (FPA) for this mission is described as well as the design for a thermally isolated, self-heated J-FET transimpedance amplifier. This amplifier is Johnson noise limited for feedback resistances from less than 10 to the 8th power Omega to greater than 2 x 10 to the 10th power Omega at T = 4.2K. Work on the focal plane array is complete. Performance testing for qualification of the flight hardware is discussed, and results are presented. All infrared data channels are measured to be background limited by the expected level of zodiacal emission.
    Keywords: ASTRONOMY
    Type: NASA-TM-80456 , REPT-280-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Concepts for large interferometers in space (1982)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Very high angular resolution can be achieved in optical and radio astronomy through interferometers in space. Evolutionary approaches and required technological advances are presented. In the optical region a phase-coherent array, (COSMIC) starting as a four-element linear array is discussed. Combining several modules results in greatly improved resolution with a goal of combining images to obtain a single field of view with 0.004 arcsecond resolution. The angular resolution, detail and temporal coverage of radio maps obtained by ground-based Very Long Interferometry (VLBI) can be greatly improved by placing one of the stations in earth orbit. An evolutionary program leading to a large aperture VLBI observatory in space is discussed.
    Keywords: ASTRONOMY
    Type: AIAA PAPER 82-1851 , Technology for Space Astrophysics Conference: The Next 30 Years; Oct 04, 1982 - Oct 06, 1982; Danbury, CT
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Balloon-borne transform spectroscopy (1976)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The design and construction of a high-resolution far-infrared Fourier-transform spectrometer for use on the Smithsonian balloon-borne one-meter telescope is described. The instrument will operate at a resolution of about 0.1 kayser in the region from 25 to 150 microns. It will be used to obtain spectra of Jupiter, Venus, Orion, and other H II and molecular cloud regions, as well as the terrestrial stratosphere.
    Keywords: ASTRONOMY
    Format: text
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  • 5
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    Combining beams from separated telescopes (1986)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: In the present paper, work is discussed which arose in the context of optical design studies for the proposed space-based COSMIC (Coherent Optical System of Modular Interferometric Collectors) telescope. The operation of COSMIC involves the combination of a number of parallel beams with a central beam-combining telescope which forms an image of the sky. The paper is mainly concerned with the aspects of beam combination. The paraxial constraint condition is considered along with tolerances regarding the individual optical elements, and imaging as a nonshearing recombination. A first-order requirement for achieving a finite field of view is discussed, taking into account specifically the case of a coherent imaging optical system.
    Keywords: ASTRONOMY
    Type: Applied Optics (ISSN 0003-6935); 25; 528-532
    Format: text
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  • 6
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    Mapping the infrared background radiation from the Shuttle (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Spacelab-2 Small Helium-Cooled Infrared Telescope will be used to map extended astronomical sources of low surface brightness emission, to measure the Shuttle induced environment and to develop techniques for managing large volumes of superfluid helium in space. The instrument is an f/4 15.2-cm Herschelian telescope with ten photoconductor detectors in the focal plane. This paper describes the hardware and software aspects of the instrument with emphasis on mission operations. In particular, a description is given of the observing plan formulated to meet the scientific and engineering objectives, the scan drive system, the precautions in design and operation necessary to prevent the sun, moon, and earth from adversely affecting the observations, the implications of thruster firings, and the on-board experiment computer application software to control the scanning of the telescope and support on-board displays.
    Keywords: ASTRONOMY
    Type: Seminar on Shuttle pointing of electro-optical experiments; Feb 10, 1981 - Feb 13, 1981; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Test results of Spacelab 2 infrared telescope focal plane (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: (Previously announced in STAR as N81-28020)
    Keywords: ASTRONOMY
    Type: Infrared astronomy - Scientific/military thrusts and instrumentation; Apr 21, 1981 - Apr 22, 1981; Washington, DC
    Format: text
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