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  • SOLAR PHYSICS  (3)
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  • 1
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    Intercomparison of solar total irradiance data from recent spacecraft measurements (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Earth Radiation Budget Experiment solar total irradiance data obtained by the solar monitors of the NOAA 9 and 10 spacecraft are presently compared with those obtained by the Solar Maximum Mission's Active Cavity Irradiance Monitor 1, as well as sounding rockets and the Nimbus 7 Earth Radiation Budget channel 10C. A disparity is noted among total irradiance values obtained in near-simultaneous measurements with absolute pyrheliometers of similar design and operational modes which (1) indicates the uncertainty associated with currently available instruments, and (2) recommends intercalibration of electrically self-calibrating pyrheliometers from spacecraft.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 93; 9503-950
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Observation of total irradiance variability from Nimbus satellites (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The cavity pyrheliometer sensor aboard Nimbus 7 is now in its tenth year of operation. Results for 9 1/2 years show a decreasing trend through the end of solar cycle 21 of approximately -0.015 percent per year, a leveling off near solar minimum and an increasing irradiance for the beginning of cycle 22. Through April 1988, the irradiance has increased about 0.06 percent above the minimum value which was about 0.08 percent below the highest values obtained near solar maximum. The rise appears more rapid than the decline.
    Keywords: SOLAR PHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 8; 7, 19
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    User's guide for the Nimbus 7 ERB Solar Analysis Tape (ESAT) (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Five years of Nimbus 7 ERB solar data is available in compact form on a single ERB solar analysis tape (ESAT). The period covered is November 16, 1978 through October 31, 1983. The Nimbus 7 satellite performs just under 14 orbits a day and the ERB solar telescope observe the Sun once per orbit as the satellite passes + or - near the south pole. The data were carefully calibrated and screened. Mean orbital and daily values are given for the total solar irradiance plus selected spectral intervals. In addition, selected solar activity indicators are on the tape. The ERB experiment, the solar data calibration and screening procedures, the solar activity indicators, and the tape format are described briefly.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-86143 , NAS 1.15:86143
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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