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  • INSTRUMENTATION AND PHOTOGRAPHY  (3)
  • SPACE TRANSPORTATION  (3)
  • 1
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    A progress report on bolometers operating at 0.1 K using adiabatic demagnetization refrigeration (1986)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Bolometers are still the detectors of choice for low background infrared observations at wavelengths longer than 200 microns. In the low background limit, bolometers become more sensitive as their operating temperature decreases, due to fundamental thermodynamic laws. The adiabatic demagnetization technique was evaluated by building a bolometer detection system operating at a wavelength of 1 millimeter for use at a ground based telescope. The system was fit checked at the telescope and is expected to take its first data in November, 1985.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Proceedings of the Second Infrared Detector Technology Workshop; 3 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Measurements of the STS orbiter's angular stability during in-orbit operations (1995)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: We report on measurements of the angular stability, commonly called 'jitter', of the STS Orbiter during normal operations in space. Measurements were carried out by measuring optically the Orbiter's roll and pitch orientation relative to the solar vector as the orbiter was held in a -Z(sub 0) solar inertial orientation (orbiter bay oriented toward the Sun). We also report observations of an interesting perturbation to the orbiter's orientation noted by the crew during the STS-60 mission. These data may be useful in analyzing the in-orbit response of the Orbiter to thruster firings and other applied torques, and may aid in the planning of future experiments that require fine-pointed operations by the orbiter.
    Keywords: SPACE TRANSPORTATION
    Type: The 1995 Shuttle Small Payloads Symposium; p 183-192
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The Orbiter Stability Experiment on STS-40 (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The Orbiter Stability Experiment (OSE) was developed to evaluate the steadiness of the STS Orbiter as a potential platform for instrumentation that would image the Sun in its extreme ultraviolet and soft X-ray radiations. We were interested in any high frequency motions of the Orbiter's orientation due to normal operations and manned activities. Preliminary results are presented of the observations. Other than the expected slow motion of the Orbiter within the specified angular deadband of 0.1 degrees during the observations, it was found that high frequency (above 1 Hz) angular motions (jitter) were not detectable at the 0.25 arc sec detection limit of the most sensitive detector, for most of the period of observation. No high frequency motions were recorded during intervals that were identified with vernier thruster firings. However, one short interval with detectable spectral power to a frequency of 10 Hz has been found to date. It has not yet been correlated with a particular activity going on at the time. The results of the observations may also be of value in assessing perturbations to the Orbiter's micro-gravity environment produced by normal operations.
    Keywords: SPACE TRANSPORTATION
    Type: The 1992 Shuttle Small Payloads Symposium; p 1-8
    Format: application/pdf
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  • 4
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    Space infrared telescope facility (SIRTF) focal plane (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Infrared Array Camera (IRAC), Multiband Imaging Photometer (MIP), and the Infrared Spectrometer (IRS) of the Space Infrared Telescope Facility (SIRTF) are described. The configuration and capabilities of the SIRTF are discussed. The small silicon array module, the germanium array module, and bolometer module of MIP, which is designed to provide sensitivity limited only by natural background and telescope emissions over the 3-200 micron spectral range, and allow diffraction limited imaging, super resolution techniques, mapping, and surveying, are examined. The objectives and design of the IRAC, which is constructed for two-dimensional photometry and imaging over a wavelength region from 2-30 microns and to perform extragalactic, galactic and solar system astronomy, are studied. The use of the IRS to study the dynamical and physical phenomena of the universe in the 2.5-200 micron range is analyzed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 86-0373
    Format: text
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  • 5
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    Support of the infrared radiometer on the ST (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The aim was to obtain practical experience, including observational experience, with bolometers suitable for the long wave infrared and with the filters necessary to define the spectral regions of interest. The techniques used in fabricating and testing bolometers and filters are described, and the results which were obtained to date are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-144818
    Format: application/pdf
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  • 6
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    Orbital operations with the Shuttle Infrared Telescope Facility /SIRTF/ (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Shuttle Infrared Telescope Facility (SIRTF) is a cryogenically-cooled, 1-m-class telescope that will be operated from the Space Shuttle as an observatory for infrared astronomy. This paper discusses the scientific constraints on and the requirements for pointing and controlling SIRTF as well as several aspects of SIRTF orbital operations. The basic pointing requirement is for an rms stability of 0.25 arcsec, which is necessary to realize the full angular resolution of the 5-micron diffraction-limited SIRTF. Achieving this stability requires the use of hardware and software integral to SIRTF working interactively with the gyrostabilized Shuttle pointing-mount. The higher sensitivity of SIRTF, together with orbital and time constraints, puts a premium on rapid target acquisition and on efficient operational and observational procedures. Several possible acquisition modes are discussed, and the importance of source acquisition by maximizing the output of an infrared detector is emphasized.
    Keywords: SPACE TRANSPORTATION
    Type: Seminar on Shuttle pointing of electro-optical experiments; Feb 10, 1981 - Feb 13, 1981; Los Angeles, CA
    Format: text
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