Analysis Filling Factor Catalogue of Different Wavelength SODISM Images

  • Amro F. AlastaEmail author
  • Mustapha Meftah
  • Rami Qahwaji
  • Abdrazag Algamudi
  • Fatma Almesrati
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 285)


The Solar Diameter Imager and Surface Mapper’s (SODISM) recording of data on the PICARD satellite in five different wavelengths has increased the need to extract features such as Sunspots. This paper analyses the overall sunspot detection performance, examines the correlation between the filling factor of different SODISM wavelengths and the Solar and Heliospheric Observatory (SOHO) filling factor, and compares them with the USAF/NOAA catalogue. Four months of data from SODISM and SOHO, obtained for the period Aug–Dec 2010, are analysed and compared. This comparison identifies the best wavelength for sunspot detection in SODISM, and compares the overall detection performance of three wavelengths; 535.7 nm, 607.1 nm and 782.2 nm. Furthermore, the study proposes a novel SODISM catalogue summarising SODISM data details including the Filling Factor, area, and the number of sunspots.


SODISM Sunspots Wavelengths SOHO PICARD Filling Factors catalogue 


  1. 1.
    Meftah, M., Hauchecorne, A., Corbard, T., Bertran, E., Chaigneau, M., Meissonnier, M.: PICARD SODISM, a space telescope to study the Sun from the middle ultraviolet to the near infrared. Sol. Phys. 289, 1–38 (2014). Scholar
  2. 2.
    Meftah, M., Irbah, A., Hauchecorne, A., Hochedez, J.F.: PICARD payload thermal control system and general impact of the space environment on astronomical observations. In: Pham, K.D., Cox, J.L., Howard, R.T., Chen, G. (eds.) Proceedings of SPIE 8739, Sensors and Systems for Space Applications VI, April 2013, vol. 8739, pp. 87390B. Baltimore, United States (2013).,
  3. 3.
    Alasta, A.F., Algamudi, A., Ipson, S.: Identification of sunspots on SODISM full-disk solar images. In: International Conference on Computing, Electronics & Communications Engineering (iCCECE 2018), Univ. Essex, Southend, UK, pp. 23–28. IEEE (2018).
  4. 4.
    Curto, J.J., Blanca, M., Martínez, E.: Automatic sunspots detection on full-disk solar images using mathematical morphology. Sol. Phys. 250(2), 411–429 (2008). Scholar
  5. 5.
    Alasta, A.F., Algamudi, A., Qahwaji, R., Ipson, S., Nagern, T.A.: Automatic sunspots detection on SODISM solar images. In: 2017 Seventh International Conference on Innovative Computing Technology (INTECH), Luton, pp. 115–119 (2017).
  6. 6.
    Alasta, A.F., Algamudi, A., Almesrati, F., Meftah, M., Qahwaji, R.: Filling factors of sunspots in SODISM images. Ann. Emerg. Technol. Comput. (AETiC) 3(2), 1–13 (2019)., Print ISSN: 2516-0281, Online ISSN: 2516-029XCrossRefGoogle Scholar
  7. 7.
    Alasta, A.F., Algamudi, A., Qahwaji, R., Ipson, S., Hauchecorne, A., Meftah, M.: New method of enhancement using wavelet transforms applied to SODISM telescope. Adv. Space Res. 63(1), 606–616 (2019). Scholar
  8. 8.
    Meftah, M., et al.: Main results of the PICARD mission. In: Proceedings SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, pp. 99040Z, 29 July 2016.
  9. 9.
    Ashamari, O., Qahwaji, R., Ipson, S., Schöll, M., Nibouche, O., Haberreiter, M.: Identification of photospheric activity features from SOHO/MDI data using the ASAP tool. J. Space Weather Space Clim. 5, 15 (2015). Scholar
  10. 10.
    Yeo, K.L., Krivova, N.A., Solanki, S.K., Glassmeier, K.H.: Reconstruction of total and spectral solar irradiance from 1974 to 2013 based on KPVT, SoHO/MDI, and SDO/HMI observations. Astron. Astrophys. 570, A85 (2014). Scholar

Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019

Authors and Affiliations

  • Amro F. Alasta
    • 1
    Email author
  • Mustapha Meftah
    • 2
  • Rami Qahwaji
    • 1
  • Abdrazag Algamudi
    • 1
  • Fatma Almesrati
    • 1
  1. 1.Electrical Engineering and Computer ScienceUniversity of BradfordBradfordUK
  2. 2.French National Centre for Scientific ResearchParisFrance

Personalised recommendations