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  • 1
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    Calibration for the SAGE III/EOS instruments (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The calibration plan for the SAGE III instruments for maintaining instrument performance during the Earth Observing System (EOS) mission lifetime is described. The SAGE III calibration plan consists of detailed preflight and inflight calibration on the instrument performance together with the correlative measurement program to validate the data products from the inverted satellite measurements. Since the measurement technique is primarily solar/lunar occultation, the instrument will be self-calibrating by using the sun as the calibration source during the routine operation of the instrument in flight. The instrument is designed to perform radiometric calibration of throughput, spectral, and spatial response in flight during routine operation. Spectral calibration can be performed in-flight from observation of the solar Fraunhofer lines within the spectral region from 290 to 1030 nm wavelength.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: In: Remote sensing of atmospheric chemistry; Proceedings of the Meeting, Orlando, FL, Apr. 1-3, 1991 (A93-31376 11-35); p. 243-250.
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    NASA TECHNICAL REPORTS
  • 2
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    Stratospheric aerosol and gas experiment III (SAGE III) aerosol and trace gas measurements for Earth Observing System (EOS) (1991)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: The SAGE III instrument, the latest in a series of satellite-based instruments employing the self-calibrating solar occultation technique to monitor aerosols and trace gases in the atmosphere, and potential contributions to monitoring global change and other EOS objectives are described. Uses of these data are illustrated with SAGE I and II long-term ozone, aerosol, and water vapor data. The SAGE III instrument will improve the SAM II and SAGE data products with greater overall accuracy, and will provide the ability to extend these measurements over a greater height range. SAGE III will provide long-term self-calibrating global data sets from the midtroposphere to mesosphere, which will contribute greatly to the quantification and understanding of global change.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: In: Remote sensing of atmospheric chemistry; Proceedings of the Meeting, Orlando, FL, Apr. 1-3, 1991 (A93-31376 11-35); p. 125-141.
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    NASA TECHNICAL REPORTS
  • 3
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    Spaceborne lidar system for measurements of atmospheric water vapor and aerosols (1985)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: The inclusion of a differential absorption lidar (DIAL) system as part of the NASA Earth Observing System (EOS) is proposed. Functioning at 720 nm, the DIAL could provide atmospheric water vapor profiles in the troposphere and stratosphere, and provide data for characterizing the physical properties of clouds. The use of frequency doubling of the laser could also open a window on the 355 nm region, and thereby molecular density and temperature profiles. The date would be of use in studies of the global hydrological cycle, the global radiation balance, climate, meteorology, and atmospheric structure and transport phenomena.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: AIAA PAPER 85-2091
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    NASA TECHNICAL REPORTS
  • 4
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    The Stratospheric Aerosol and Gas Experiment II (SAGE II) design and in-orbit performance (1986)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: The design and in-orbit performance data are presented for the Stratospheric Aerosol and Gas Experiment II (SAGE II) instrument which was launched by Shuttle on the Earth Radiation Budget Satellite. SAGE II is a sun photometer that measures the extinction of solar radiation caused by the earth's atmosphere in seven spectral channels ranging in center wavelength from 0.385 to 1.02 micrometers. These measurements, which occur twice each orbit during satellite sunrise and sunset, are inverted to yield vertical distributions of stratospheric aerosols, ozone, water vapor, and nitrogen dioxide. The SAGE II instrument consists of a Cassegrain telescope with a two axis gimbal mounting, a grating spectrometer, and a 12 bit data system. The instrument tracks the solar centroid in the azimuth plane and vertically scans the instrument's instantaneous field of view across the sun for tangent altitudes ranging from the earth's horizon to 150 km. SAGE II is a third generation instrument following the highly successful Stratospheric Aerosol Measurement II (SAM II) and SAGE I programs.
    Keywords: SPACECRAFT INSTRUMENTATION
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  • 5
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    The Lidar In-Space Technology Experiment (LITE) (1992)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: The characteristics of a large lidar system, the Lidar In-Space Technology Experiment (LITE), which is being developed for launch in 1994 into an earth orbit, are described together with the type of investigations to be performed by LITE. LITE will measure atmospheric parameters such as cloud heights, profiles of aerosols and temperature, and surface characteristics. The experiment is modular in design and can be used as a testbed for the evolution of future lidar designs and technologies. Diagrams of the LITE hardware pallet configuration for Shuttle flights, the LITE telescope receiver configuration, and the optics bench layout are presented.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: IAF PAPER 92-0753
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    NASA TECHNICAL REPORTS
  • 6
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    The Stratospheric Aerosol and Gas Experiment III instrument proposed for EOS - A conceptual design (1989)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: This paper describes the Stratospheric Aerosol and Gas Experiment III (SAGE III) instrument proposed for the Earth Observing System (EOS), which is designed to monitor the vertical distribution of stratospheric aerosols, ozone, water vapor, nitrogen dioxide, and temperature by measuring the extinction and scattering of solar radiation in the 03 to 1.6 micron range through the atmosphere. The SAGE III employs proven concepts which have evolved from the SAM II, SAGE, and SAGE II programs. The launch is scheduled for the summer of 1996. The SAGE II block diagram is included.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Advanced Optical Instrumentation for Remote Sensing of the Earth''s Surface from Space; Apr 27, 1989 - Apr 28, 1989; Paris; France
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    NASA TECHNICAL REPORTS
  • 7
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    A high radiometric performance CCD for the third generation stratospheric aerosol and gas experiment (1991)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: A third-generation SAGE instrument is about to be designed as part of the NASA Earth Observational System. Previous instruments have used individual diodes as detectors. The new instrument will use a custom design CCD to dramatically enhance the study of the gas and aerosol components of the upper atmosphere. The CCD is a 3 by 400 imaging array that has a single serial register and an exposure control drain. It will be used at the focal plane of a spectrometer covering the spectral range from 288 nm to 1.02 micron.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: In: Surveillance technologies; Proceedings of the Meeting, Orlando, FL, Apr. 2-5, 1991 (A93-27712 09-35); p. 31-40.
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  • 8
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    A conceptual design study for the EOS Lidar Atmospheric Sounder and Altimeter facility (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A preliminary design study is presented for the Lidar Atmospheric Sounder and Altimeter (LASA), an active remote sensor for the Earth Observing System. LASA is designed to measure the global vertical distributions of aerosols, cloud top heights, atmospheric trace gases, atmospheric temperature and pressure, and the height of the PBL. The measurements are made using optical radar, differential absorption lidar, and laser altimetry. An experiment proposed for the LASA facility, the EOS Atmospheric Global Lidar Experiment (EAGLE) is described in detail. The EAGLE program is planned to determine aerosol and cloud distributions, water vapor concentrations, and temperature profiles over the troposphere and aerosol distribution over the stratosphere. The measurement techniques, receiver system, and transmitter for the EAGLE program are examined and the conceptual design of the EAGLE experiment and the LASA/EAGLE interface is outlined.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Infrared Technology XIV; Aug 15, 1988 - Aug 17, 1988; San Diego, CA; United States
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