ðə saɪəntˈɪfɪk pˈɜːpəs ʌvðɪ ɛɹˈoʊnəmi ʌv ˈaɪs ɪnðə mˈɛsəsfˌɪɹ ˌeɪˌaɪˈɛm mˈɪʃən ɪz fˈoʊkəst ɔnðə stˈʌdi ʌv pˈoʊlɚ mˌɛsəsfˈɛɹɪk klˈaʊdz pˌiːˌɛmsˌiːˈɛs ðæt fˈɔːɹm ɐbˌaʊt əbˌʌv ðə sˈɜːfɪs ʌv ˈɜːθ ɪn sˈʌmɚ ænd mˈoʊstli ɪnðə pˈoʊlɚ ɹˈiːdʒənz ʌv ˈɜːθ.
The scientific purpose of the Aeronomy of Ice in the Mesosphere (AIM) mission is focused on the study of polar mesospheric clouds (PMCs) that form about  above the surface of Earth in summer and mostly in the polar regions of Earth.