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Gamma-ray imaging spectrometer

balloon-borne gamma-ray spectrometer instrument

Pronunciation
/ˈɡamə - reɪ ˈɪmɪʤɪŋ spɛkˈtrɒmɪtə/
/ˈɡæmə - reɪ ˈɪmɪʤɪŋ spɛkˈtrɑmədər/