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  • Other Sources  (6)
  • 1985-1989  (6)
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  • 1
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    Results from the Earth Radiation Budget Experiment (ERBE) (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The Earth Radiation Budget Experiment (ERBE) has been observing the earth during the past 4 years from three satellites. Numerous validation procedures have been applied to the data. Particularly important have been intercomparisons between three channels of scanning radiometers and wide and medium field-of-view radiometers. These intercomparisons and onboard calibration targets have provided assurance of high data quality. In addition to the classic radiation budget parameters: global absorbed and emitted energy, ERBE is producing fluxes on scales of 250 km that can significantly increase understanding of the earth's climate. Of particular interest are ERBE measurements of clear-sky albedos and longwave fluxes, which are part of the ERBE data products. Use of data from the precessing ERBE satellite together with data from the sun-synchronous NOAA-9 and NOAA-10 satellites also provides information on the diurnal cycle of shortwave and longwave fluxes.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Advances in Space Research (ISSN 0273-1177); 9; 7, 19
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Earth Radiation Budget Satellite extraterrestrial solar constant measurements - 1986-1987 increasing trend (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: From June 1986 through Nov 1987, the Earth Radiation Budget Satellite (ERBS) pyrheliometric measurements indicated that the solar constant was increasing approximately +0.02 percent per year. Earlier ERBS measurements indicated that the solar constant was declining approximately -0.03 percent per year during the 1984 through mid-1986 period. Since mid-1986 represents the beginning of solar cycle 22, it is believed that the reversal in the long-term solar constant trend may be linked to increased solar activity associated with the beginning of the 11-year sunspot cycle. The typical value of the solar constant was found to be 1365 Wm-2.
    Keywords: SOLAR PHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 8; 7, 19
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    NASA TECHNICAL REPORTS
  • 3
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    Characteristics of the earth radiation budget experiment solar monitors (1987)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The earth radiation budget experiment solar monitors, active cavity pyrheliometers, have been developed to measure every two weeks the total optical solar irradiance from the earth radiation budget satellite (ERBS) and the National Oceanic and Atmospheric Administration NOAA-9 spacecraft platforms. In the unfiltered 0.2-50-micron wavelength broadband region, the monitors were used to obtain 1365 W/sq m as the mean value for the solar irradiance, with measurement precisions and accuracies approaching 0.1 and 0.2 percent, respectively. The design and characteristics of the solar monitors are presented along with the data reduction model. For the October 1984 through July 1985 period, the resulting ERBS and NOAA-9 solar irradiance values are intercompared.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Applied Optics (ISSN 0003-6935); 26; 3090-309
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    NASA TECHNICAL REPORTS
  • 4
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    Climate and the Earth's Radiation Budget (1989)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: Data from NASA's Earth Radiation Budget (ERB) Experiment instruments carried by the ERB Satellite and by NOAA-9 and -10 are presently evaluated, with a view to the role played by clouds in the global radiation energy balance. While an individual water droplet scatters 85 percent of incident energy in the forward direction, a cloud of such drops can scatter 75 percent or more of the energy backward. The resulting enhancement of surface-atmosphere albedo reduces the solar radiation absorbed by the atmospheric column. Clouds also significantly enhance the long-wave opacity of the atmosphere; like gaseous absorption, this reduces the radiation emitted to space.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Physics Today (ISSN 0031-9228); 42; 22-32
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    NASA TECHNICAL REPORTS
  • 5
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    A preliminary computer pattern analysis of satellite images of mature extratropical cyclones (1987)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: This study has applied computerized pattern analysis techniques to the location and classification of features of several mature extratropical cyclones that were depicted in GOES satellite images. These features include the location of the center of the cyclone vortex core and the location of the associated occluded front. The cyclone type was classified in accord with the scheme of Troup and Streten. The present analysis was implemented on a personal computer; results were obtained within approximately one or two minutes without the intervention of an analyst.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review (ISSN 0027-0644); 115; 556-563
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    NASA TECHNICAL REPORTS
  • 6
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    Characterizations of the Earth Radiation Budget Experiment (ERBE) scanning radiometers (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: NASA's Earth Radiation Budget Experiment employs the Earth Radiation Budget Satellite and the NOAA 9 and 10 spacecraft to obtain absolute measurements of incoming solar radiation, shortwave earth-reflected solar radiation, and longwave earth-emitted radiation, using both scanning and nonscanning radiometers. Each of the three remote-sensing spacecraft carry narrow FOV scanning radiometers whose detection sensors are thermistor bolometers. Attention is presently given to the calibration models and methods employed in characterizing the scanning radiometers' output signals; the design features of the scanners and flight calibration systems are presented.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Optical Radiation Measurements II; Mar 27, 1989 - Mar 28, 1989; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
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