Multi-frequency solar observations at Metsähovi Radio Observatory and KAIRA

J. Kallunki, M. Uunila, D. McKay-Bukowski

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)


We describe solar observations carried out for the first time jointly with Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) and Aalto University Metsähovi Radio Observatory (MRO). KAIRA is new radio antenna array observing the decimeter and meter wavelength range. It is located near Kilpisjärvi, Finland, and operated by the Sodankylä Geophysical Observatory, University of Oulu. We investigate the feasibility of KAIRA for solar observations, and the additional benefits of carrying out multi-instrument solar observations with KAIRA and the MRO facilities, which are already used for regular solar observations. The data measured with three instruments at MRO, and with KAIRA during time period 2014 April-October were analyzed. One solar radio event, measured on 2014 April 18, was studied in detail. Seven solar flares were recorded with at least two of the three instruments at MRO, and with KAIRA during the chosen time period. KAIRA is a great versatile asset as a new Finnish instrument that can also be used for solar observations. Collaboration observations with MRO instruments and KAIRA enable detailed multi-frequency solar flare analysis. Flare pulsations, flare statistics and radio spectra of single flares can be investigated due to the broad frequency range observations. The Northern locations of both MRO and KAIRA make as long as 15-hour unique solar observations possible during summer time.
Original languageEnglish
Pages (from-to)566-569
Number of pages4
JournalAstronomische Nachrichten
Issue number6
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed


  • instrumentation: miscellaneous
  • Sun: activity
  • Sun: flares


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