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  • 1
    Electronic Resource
    Electronic Resource
    Extrasolar planet detection (1994)
    Springer
    Astrophysics and space science 212 (1994), S. 369-383 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper discusses the concept of extrasolar planet detection using a large-aperture infrared imaging telescope. Coronagraphic stellar apodization techniques are less efficient at infrared wavelengths compared to the visible, as a result of practical limitations on aperture dimensions, thus necessitating additional starlight suppression to make planet detection feasible in this spectral domain. We have been investigating the use of rotational shearing interferometry to provide up to three orders of magnitude of starlight suppression over broad spectral bandwidths. We present a theoretical analysis of the system performance requirements needed to make this a viable instrument for planet detection, including specifications on the interferometer design and telescope aperture characteristics. The concept of using rotational shearing interferometry as a wavefront error detector, thus providing a signal that can be used to adaptively correct the wavefront, will be discussed. We also present the status of laboratory studies of on-axis source suppression using a recently constructed rotational shearing interferometer that currently operates in the visible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984540
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Extrasolar planet detection (1994)
    Springer
    Details
    Publication Date: 1994-02-01
    Print ISSN: 0004-640X
    Electronic ISSN: 1572-946X
    Topics: Physics
    Published by Springer
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    PAPER CURRENT
  • 3
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    Extrasolar planet detection (1994)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: This paper discusses the concept of extrasolar planet detection using a large-aperture infared imaging telescope. Coronagraphic stellar apodization techniques are less efficient at infrared wavelengths compared to the visible, as a result of practical limitations on aperture dimensions, thus necessitating additional starlight suppression to make planet detection feasible in this spectral domain. We have been investigating the use of rotational shearing interferometry to provide up to three orders of magnitude of starlight suppression over broad spectral bandwidths. We present a theoretical analysis of the system performance requirements needed to make this a viable instrument for planet detection, including specifications on the interferometer design and telescope aperture characteristics. The concept of using rotational shearing interferometry as a wavefront error detector, thus providing a signal that can be used to adaptively correct the wavefront, will be discussed. We also present the status of laboratory studies of on-axis source suppression using a recently constructed rotational shearing interferometer that currently operates in the visible.
    Keywords: ASTRONOMY
    Type: Astrophysics and Space Science (ISSN 0004-640X); 212; p. 369-383
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Overview of the MicroPrecision Interferometer Testbed (1998)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper gives an overview of the Micro-Precision Interferometer (MIP) testbed and its major achievements to date related to mitigating risk for future spaceborne optical interferometer missions.
    Keywords: Instrumentation and Photography
    Type: AACC, American Control Conference 1998; Philadelpha, PA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Level 1 Radiance Scaling and Conditioning Algorithm Theoretical Basis (2000)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: The Algorithm Theoretical Basis (ATB) document describes the algorithms used to produce the Multi-angle Imaging SpectroRadiometer (MISR) Level 1B1 Radiometric Product, and certain parameters of the Level 1A Reformatted Annotated Product.
    Format: text
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  • 6
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    Overview of SIM wide angle astrometric system calibration strategies (2002)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper summarizes two very different strategies envisioned for calibrating the systematic field dependent biases present in the Space Interferometry Mission (SIM) instrument. The Internal Calibration strategy is based on pre-launch measurements combined with a set of on orbit measurements generated by a source internal to the instrument. The External Calibration strategy uses stars as an external source for generating the calibration function. Both approaches demand a significant amount of innovation given that SIM's calibration strategy requires a post-calibration error of 100picometers over a 15 degree field of regard while the uncalibrated instrument introduces 10's-100's of nanometers of error. The calibration strategies are discussed in the context of the Wide Angle Astrometric mode of the instrument, although variations on the Internal Calibration Strategy may be used for doing Narrow Angle Astrometry.
    Keywords: Astronomy
    Type: Astronomical Telescopes and Instrumentation Conference; Waikoloa, HI; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Level 1 Georectification and Registration Algorithm Theoretical Basis (1999)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This Algorithm Theoretical Basis (ATB) document describes the algorithms used to generate the Multi-angle Imaging SpectroRadiometer (MISR) Level 1B2 Georectified Radiance Product (GRP).
    Format: text
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  • 8
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    Error Modeling of Multibaseline Optical Truss: Part 1: Modeling of System Level Performance (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: Global astrometry is the measurement of stellar positions and motions. These are typically characterized by five parameters, including two position parameters, two proper motion parameters, and parallax. The Space Interferometry Mission (SIM) will derive these parameters for a grid of approximately 1300 stars covering the celestial sphere to an accuracy of approximately 4uas, representing a two orders of magnitude improvement over the most precise current star catalogues. Narrow angle astrometry will be performed to a 1uas accuracy. A wealth of scientific information will be obtained from these accurate measurements encompassing many aspects of both galactic (and extragalactic science. SIM will be subject to a number of instrument errors that can potentially degrade performance. Many of these errors are systematic in that they are relatively static and repeatable with respect to the time frame and direction of the observation. This paper and its companion define the modeling of the, contributing factors to these errors and the analysis of how they impact SIM's ability to perform astrometric science.
    Keywords: Astronomy
    Type: Proceedings of SPIE Space Systems Engineering and Optical Alignment Mechanisms; 5528; Article 118
    Format: text
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