Title
Filling Factors of Sunspots in SODISM Images.
Abstract
The calculated filling factors (FFs) for a feature reflect the fraction of the solar disc covered by that feature, and the assignment of reference synthetic spectra. In this paper, the FFs, specified as a function of radial position on the solar disc, are computed for each image in a tabular form. The filling factor (FF) is an important parameter and is defined as the fraction of area in a pixel covered with the magnetic field, whereas the rest of the area in the pixel is field-free. However, this does not provide extensive information about the experiments conducted on tens or hundreds of such images. This is the first time that filling factors for SODISM images have been catalogued in tabular formation. This paper presents a new method that provides the means to detect sunspots on full-disk solar images recorded by the Solar Diameter Imager and Surface Mapper (SODISM) on the PICARD satellite. The method is a totally automated detection process that achieves a sunspot recognition rate of 97.6%. The number of sunspots detected by this method strongly agrees with the NOAA catalogue. The sunspot areas calculated by this method have a 99% correlation with SOHO over the same period, and thus help to calculate the filling factor for wavelength (W.L.) 607nm.
Year
DOI
Venue
2019
10.33166/aetic.2019.02.001
arXiv: Solar and Stellar Astrophysics
DocType
Volume
Issue
Journal
abs/1904.01133
2
ISSN
Citations 
PageRank 
Published by International Association of Educators and Researchers (IAER ) Annals of Emerging Technologies in Computing (AETiC) Vol. 3, No. 2, 2019
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Amro F. Alasta100.34
Abdulrazag Algamudi200.34
Fatma Almesrati300.34
M. Meftah4102.10
Rami Qahwaji512021.05