with  being the proportion of direct radiation from a given solar angle, and  being the proportion of diffuse illumination, the actual albedo  (also called blue-sky albedo) can then be given as:
wɪð bˌiːɪŋ ðə pɹəpˈoːɹʃən ʌv dᵻɹˈɛkt ɹˌeɪdɪˈeɪʃən fɹʌm ɐ ɡˈɪvən sˈoʊlɚɹ ˈæŋɡəl, ænd bˌiːɪŋ ðə pɹəpˈoːɹʃən ʌv dᵻfjˈuːz ɪlˌuːmᵻnˈeɪʃən, ðɪ ˈæktʃuːəl ælbˈiːdoʊ ˈɔːlsoʊ kˈɔːld blˈuːskˈaɪ ælbˈiːdoʊ kæn ðˈɛn biː ɡˈɪvən æz: