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  • 1
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    Airborne imaging spectrometer - A new tool for remote sensing (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The first of a new class of remote sensing instruments is described. The Airborne Imaging Spectrometer represents the first use of two-dimensional integrated infrared area arrays in a scientific application. The instrument images 32 cross-track pixels simultaneously, each in 128 spectral bands in the 1.2- to 2.4-micron region. The IFOV of the instrument is 1.9 mrad/pixel and the spectral sampling interval is 9.6 nm. Plans include upgrading the detector from the current 32 x 32 element HgCdTe CCD array to a 64 x 64 element array in 1985. Science and engineering data are currently being actively gathered with the instrument.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-22; 546-549
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    An imaging spectrometer experiment for the Shuttle (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: An imaging spectrometer experiment concept for earth remote sensing, developed as part of NASA's Multispectral Linear Array program, will map a series of test sites at high spatial and spectral resolution from the vantage point of the Shuttle payload bay. The instrument covers the spectral range from 0.4 to 2.5 micrometers with a sampling interval of 10 nanometers in the visible and near infrared (to 1.0 micrometer) and 20 nanometers in the short wavelength infrared (1.0 to 2.5 micrometers). Resolution corresponding to a ground instantaneous field of view (pixel size) of 30 meters is provided over a swath width of 12 kilometers. On-board data editing is utilized to select a subset of the data stream for transmission to the ground. The instrument utilizes silicon and mercury cadmium telluride area array detectors. Pointing mirrors are included to permit specific test sites to be imaged from the Shuttle orbit.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: 1983 International Geoscience and Remote Sensing Symposium (IGARSS ''83); Aug 31, 1983 - Sep 02, 1983; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Airborne imaging spectrometer - A new tool for remote sensing (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The first of a new class of remote sensing instruments is described. The Airborne Imaging Spectrometer represents the first use of two-dimensional area arrays in a scientific application. The instrument images 32 cross-track pixels simultaneously, each in 128 spectral bands in the 1.2 to 2.4 micro region. The IFOV of the instrument is 1.9 mrad and the spectral sampling interval is 9.6 nanometers. Plans include upgrading the detector from the current 32 x 32 element HgCdTe CCD array to a 64 x 64 element array in 1984. Science and engineering data are currently being actively gathered with the instrument.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: 1983 International Geoscience and Remote Sensing Symposium (IGARSS ''83); Aug 31, 1983 - Sep 02, 1983; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A Shuttle Imaging Spectrometer Experiment for the late 1980's (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Shuttle Imaging Spectrometer Experiment (SISEX), proposed as a next experimental step in the development of advanced earth remote sensing technology, is capable of imaging the earth's surface simultaneously in 128 spectral bands covering the range from 0.4 to 2.5 micrometers. Laboratory and field measurements have suggested the utility of high-spectral-resolution remote sensing, and an aircraft-borne precursor to the SISEX has demonstrated the ability to distinguish among differing vegetation and rock types - in certain cases making unique identifications. The SISEX instrument utilizes an area-array focal plane, populated by visual- and infrared-sensitive detectors, to acquire simultaneous spatial and spectral information on a line-by-line basis. The spectrum is dispersed by means of a prism spectrometer. The performance analysis indicates that the scientific requirements for radiometric precision can be achieved using optics with an effective circular aperture of 11 cm.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NTC ''83; Nov 14, 1983 - Nov 16, 1983; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    A Hand Held Ratioing Radiometer for remote radiance measurements (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The small, lightweight Hand Held Ratioing Radiometer (HHRR) measures the ratio of spectral reflectance in any of 25 pairs of narrow bands in the 400 to 2500 nanometer spectral region. Two parallel optical trains view the scene through separate filters mounted in two filter wheels each containing five filters. Absolute reflectance of the scene can also be measured. HHRR is particularly useful for ground truth studies for the interpretation of imagery from Landsat, the thematic mappers and the forthcoming SPOT satellite. Its small size and simplicity of operation make it useful to geologists, botanists, oceanographers and many other geotechnologists.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Canadian Symposium on Remote Sensing; Sep 08, 1981 - Sep 11, 1981; Winnipeg; Canada
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Experiments in infrared multispectral mapping of earth resources (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Two evolutionary infrared remote sensing experiments provide the basis for the development of an operational mapping capability for geology exploration. A 10-band radiometer scheduled for an early Shuttle flight has completed an aircraft flight program which demonstrated the utility of a number of narrow spectral channels. A multispectral mapper utilizing an infrared area array detector to acquire simultaneous images in multiple wavelengths is being assembled. A design concept for an operational sensor which employs area arrays for registered multispectral image data acquisition is under study. The sensor would utilize onboard spectral band selection, radiometric correction, and data compression to satisfy the demanding requirements of the user community.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 80-1930 , Sensor Systems for the 80''s Conference; Dec 02, 1980 - Dec 04, 1980; Colorado Springs, CO
    Format: text
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    NASA TECHNICAL REPORTS
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