Analysis Of Sunspot Number Counts, Sunspot Area, And Sunspot Irradiance Deficit: 2002-2011

Details Analysis Of Sunspot Number Counts, Sunspot Area, And Sunspot Irradiance Deficit: 2002-2011 Analysis Of Sunspot Number Counts, Sunspot Area, And Sunspot Irradiance Deficit: 2002-2011

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.0301b&link_type=abstract

American Astronomical Society, SPD meeting #42, #3.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Sunspot numbers have been traditionally associated with strength of solar activity, and feed into a variety of space weather forecast models.
We present a detailed analysis of (i) sunspot number counts, (ii) sunspot area, (iii) their component umbral and penumbral intensities, and (iv) sunspot irradiance deficit as measured from 5-minute cadence true continuum images observed with the USAF/AFRL's Improved Solar Observing Optical Network (ISOON) prototype telescope. The data were acquired from December 2002 - present. These measures are obtained, semi-automatically.
We relate these observed measures to the daily NOAA/SWPC Sunspot Numbers, and International Sunspot Numbers, and trace the intra-day fluctuations in sunspot numbers to its component constituents. With higher data cadence of modern instruments, we relate the advantages and disadvantages of automating the process. We trace inherent fluctuations in sunspot numbers to the underlying solar activity, and relate them to the solar eruptive process.
This work was supported by the Air Force Office of Scientific Research (AFOSR)

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