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N. V. Nitta, J. R. Lemen (LMSAL), S. M. Hill (NOAA/SEC)
The Yohkoh satellite completed its mission on 14 December 2001. The Soft X-ray Telescope (SXT) on board Yohkoh observed the dynamic solar corona nearly continuously for more than 10 years, leading to many important discoveries in solar physics. Now similar soft X-ray images of the Sun are taken by the Soft X-ray Imager (SXI) on the GOES-M satellite. The primary purpose of SXI is to improve space weather forecasting, but its data are useful for science as well. In order to understand solar cycle effect on the solar output, stationary or transient, it is important to understand how SXI and SXT images compare with each other. We study the images taken during the last few months of Yohkoh's life, when SXI took more than 100000 images as a test run. We report on how these images are photometrically compared and how different instrument characteristics affect the capability to observe transient phenomena.
The author(s) of this abstract have provided an email address for comments about the abstract: nitta@lmsal.com
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Bulletin of the American Astronomical Society, 36 #2
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