Processing Photometric Full-Disk Solar Images |
| |
| Authors: | S R Walton G A Chapman A M Cookson JJ Dobias D G Preminger |
| |
| Institution: | (1) San Fernando Observatory, Department of Physics and Astronomy, California State University, Northridge, 18111 Nordhoff St., Northridge, CA, 91330–8268, U.S.A. |
| |
| Abstract: | Daily, photometric, full-disk digital solar images have been taken at the San Fernando Observatory (SFO) at two resolutions and in several wavelengths for more than eleven years. We describe the standard data processing techniques used for these images, including: calibration, limb fitting, geometric correction, and production of a solar contrast map by limb-darkening removal. The resulting contrast maps have a photometric accuracy which is often a few tenths of a percent. We show that the geometric accuracy of our images, as measured by the reproducibility of disk and sunspot areas, is very high as well. The techniques described in this paper should be applicable to any instrument producing full-disk photometric images. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
