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  • 1
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    Spectral and radiometric calibration of the Airborne Visible/Infrared Imaging Spectrometer (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The laboratory spectral and radiometric calibration of the AVIRIS science data collected since 1987 is described. The instrumentation and procedures used in the calibration are discussed and the accuracy achieved in the laboratory as determined by measurement and calculation is compared with the requirements. Instrument performance factors affecting radiometry are described. The paper concludes with a discussion of future plans.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Airborne Visible/Infrared Imaging Spectrometer (AVIRIS). A Description of the Sensor, Ground Data Processing Facility, Laboratory Calibration, and First Results; Airborne Visible(Inf
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Comparison of laboratory calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) at the beginning and end of the first flight season (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Spectral and radiometric calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) were performed in the laboratory in June and November, 1987, at the beginning and end of the first flight season. Those calibrations are described along with changes in instrument characteristics that occurred during the flight season as a result of factors such as detachment of the optical fibers to two of the four AVIRIS spectrometers, degradation in the optical alignment of the spectrometers due to thermally-induced and mechanical warpage, and breakage of a thermal blocking filter in one of the spectrometers. These factors caused loss of signal in three spectrometers, loss of spectral resolution in two spectrometers, and added uncertainty in the radiometry of AVIRIS. Results from in-flight assessment of the laboratory calibrations are presented. A discussion is presented of improvements made to the instrument since the end of the first flight season and plans for the future. Improvements include: (1) a new thermal control system for stabilizing spectrometer temperatures, (2) kinematic mounting of the spectrometers to the instrument rack, and (3) new epoxy for attaching the optical fibers inside their mounting tubes.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Proceedings of the Airborne Visible/Infrared Imaging Spectro; Proceedings of the A
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    AVIRIS performance during the 1987 flight season: An AVIRIS project assessment and summary of the NASA-sponsored performance evaluation (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Results are presented of the assessment of AVIRIS performance during the 1987 flight season by the AVIRIS project and the earth scientists who were chartered by NASA to conduct an independent data quality and sensor performance evaluation. The AVIRIS evaluation program began in late June 1987 with the sensor meeting most of its design requirements except for signal-to-noise ratio in the fourth spectrometer, which was about half of the required level. Several events related to parts failures and design flaws further reduced sensor performance over the flight season. Substantial agreement was found between the assessments by the project and the independent investigators of the effects of these various factors. A summary of the engineering work that is being done to raise AVIRIS performance to its required level is given. In spite of degrading data quality over the flight season, several exciting scientific results were obtained from the data. These include the mapping of the spatial variation of atmospheric precipitable water, detection of environmentally-induced shifts in the spectral red edge of stressed vegetation, detection of spectral features related to pigment, leaf water and ligno-cellulose absorptions in plants, and the identification of many diagnostic mineral absorption features in a variety of geological settings.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Proceedings of the Airborne Visible/Infrared Imaging Spectromet; Proceedings of the A
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    AVIRIS ground data-processing system (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) has been under development at JPL for the past four years. During this time, a dedicated ground data-processing system has been designed and implemented to store and process the large amounts of data expected. This paper reviews the objectives of this ground data-processing system and describes the hardware. An outline of the data flow through the system is given, and the software and incorporated algorithms developed specifically for the systematic processing of AVIRIS data are described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Airborne Visible/Infrared Imaging Spectrometer (AVIRIS). A Description of the Sensor, Ground Data Processing Facility, Laboratory Calibration, and First Results; Airborne Visible(Inf
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Spectral and radiometric calibration of the Airborne Visible/Infrared Imaging Spectrometer (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The laboratory spectral and radiometric calibration of the AVIRIS science data collected since 1987 is described. The instrumentation and procedures used in the calibration are discussed and the accuracy achieved in the laboratory as determined by measurement and calculation is compared with the requirements. Instrument performance factors affecting radiometry are described. The paper concludes with a discussion of future plans.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Imaging Spectroscopy II; Aug 20, 1987 - Aug 21, 1987; San Diego, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    AVIRIS ground data-processing system (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) has been under development at JPL for the past four years. During this time, a dedicated ground data-processing system has been designed and implemented to store and process the large amounts of data expected. This paper reviews the objectives of this ground data-processing system and describes the hardware. An outline of the data flow through the system is given, and the software and incorporated algorithms developed specifically for the systematic processing of AVIRIS data are described.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: Imaging Spectroscopy II; Aug 20, 1987 - Aug 21, 1987; San Diego, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Comparison of laboratory calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) at the beginning and end of the first flight season (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Spectral and radiometric calibrations of AVIRIS are described together with changes in instrument characteristics that occurred during the flight season. These changes include detachment of the optical fibers to two of the four AVIRIS spectrometers, degradation in the optical alignment of the spectrometers due to thermally induced and mechanical warpage, and breakage of a thermal blocking filter in one of the spectrometers. Means of improving the instrument are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing; Apr 06, 1988 - Apr 08, 1988; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
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