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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Spelling suggestions: "subject:"avelength 607nm"" "subject:"awavelength 607nm""

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Identification of Sunspots on SODISM Full-Disk Solar Images

Alasta, Amro F., Algamudi, Abdulrazag, Qahwaji, Rami S.R., Almesrati, Fatma January 2018 (has links)
Yes / 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.
Sunspots
PICARD satellite
SOHO
Segmentation
Wavelength 607nm
Filling factors
Solar images

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