Processing Photometric Full-Disk Solar Images

Details Processing Photometric Full-Disk Solar Images Processing Photometric Full-Disk Solar Images

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spd....28.0222w&link_type=abstract

American Astronomical Society, SPD meeting #28, #02.22; Bulletin of the American Astronomical Society, Vol. 29, p.897

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Scientific paper

The Cartesian Full Disk Telescopes (CFDTs) at the San Fernando Observatory (SFO) produce daily full-disk digital solar images using a linear Reticon diode array scanned by the Earth's rotation. In this paper, we describe in some detail the data processing techniques used to extract photometric information from CFDT images. We believe our experience in this field will be found useful by other workers as more instruments are built and operated with similar scientific goals to the CFDT. We describe: 1. our photometric calibration techniques and accuracy; 2. the method we use to identify the position of the limb; 3. production of a contrast map from the image, including finding a mean limb darkening curve; 4. identification of solar features. Preprints of a paper giving all algorithms in detail will be available at the meeting. This research has been supported by NASA grant NAGW-3017 and NSF grant ATM-9504374.

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