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Oulu Cosmic Ray Station . Oulu Cosmic Ray station of the University of Oulu in PuuLinnanmaa neighbourhood in Oulu Oulun yliopiston kosmisen steilyn mittausasema PuuLinnanmaalla Oulussa own Estormiz source exifheading Cczero in Oulu Built in Finland in Cosmic rays Linnanmaa October in Finland Taken with Canon EOS University