HR: 1340h
AN: SH13A-1108    [Abstracts]
TI: Sunspot Numbers and Sunspot Irradiance Reductions as Obtained with OSPAN Semi- automatic Analysis
AU: * Balasubramaniam, K S
EM: bala@nso.edu
AF: USAF/AFRL, Solar Disturbances Prediction, Sacramento Peak, Sunspot, NM 88349, United States
AU: Neidig, D F
EM: neid79@comcast.net
AF: National Solar Observatory, Sacramento Peak, Sunspot, NM 88349, United States
AU: Radick, R R
EM: radick@nso.edu
AF: USAF/AFRL, Solar Disturbances Prediction, Sacramento Peak, Sunspot, NM 88349, United States
AU: Henry, T
EM: tex@nso.edu
AF: National Solar Observatory, Sacramento Peak, Sunspot, NM 88349, United States
AB: 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).
DE: 7529 Photosphere
DE: 7594 Instruments and techniques
DE: 7894 Instruments and techniques
DE: 7924 Forecasting (2722)
DE: 7974 Solar effects
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting