Computer Science – Performance
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nasa.reptt....c&link_type=abstract
Technical Report, NASA/CR-97-205862; NAS 1.26:205862
Computer Science
Performance
Data Acquisition, Solar Spectra, Statistical Analysis, Time Series Analysis, Errors, Solar Cycles, Daytime, Drift (Instrumentation), Light (Visible Radiation), Noaa 11 Satellite, Scanners, Solar Backscatter Uv Spectrometer, Solar Radiation, Solar Rotation
Scientific paper
During this period of performance, 1 March 1997 - 31 August 1997, the NOAA-11 SBUV/2 solar spectral irradiance data set was validated using both internal and external assessments. Initial quality checking revealed minor problems with the data (e.g. residual goniometric errors, that were manifest as differences between the two scans acquired each day). The sources of these errors were determined and the errors were corrected. Time series were constructed for selected wavelengths and the solar irradiance changes measured by the instrument were compared to a Mg II proxy-based model of short- and long-term solar irradiance variations. This analysis suggested that errors due to residual, uncorrected long-term instrument drift have been reduced to less than 1-2% over the entire 5.5 year NOAA-11 data record. Detailed statistical analysis was performed. This analysis, which will be documented in a manuscript now in preparation, conclusively demonstrates the evolution of solar rotation periodicity and strength during solar cycle 22.
Cebula Richard P.
DeLand Matthew T.
Hilsenrath Ernest
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