Sunspot Numbers and Sunspot Irradiance Reductions as Obtained with OSPAN Semi- automatic Analysis

Details Sunspot Numbers and Sunspot Irradiance Reductions as Obtained with OSPAN Semi- automatic Analysis Sunspot Numbers and Sunspot Irradiance Reductions as Obtained with OSPAN Semi- automatic Analysis

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh13a1108b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH13A-1108

Physics

7529 Photosphere, 7594 Instruments And Techniques, 7894 Instruments And Techniques, 7924 Forecasting (2722), 7974 Solar Effects

Scientific paper

The USAF/AFRL Optical Solar PAtrol Network telescope (OSPAN) acquires true continuum solar images (0.08 Å bandwidth) in the optical region(6303.15 Å). OSPAN analysis software includes semi-automatic routines for measuring (1) sunspot counts, which we compare with counts obtained by traditional methods, and (2) solar irradiance reductions due tosunspot blocking. We present measurements of the variation of irradiance reductions as a function of the solar cycle, including examples of irradiance reduction due to sunspot activity during solarcycle maximum. This work was supported by US Air Force Office of Scientific Research (AFOSR).

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