Which means "the th smoothed value of the time derivative of a radius R". However, for this mission, an overline ( �) was missing in the formula, which looks something like this:
w ɪ t̠ʃ WORD_BOUNDARY m iː n z WORD_BOUNDARY ð ə WORD_BOUNDARY t iː eɪ t̠ʃ WORD_BOUNDARY s m uː ð d WORD_BOUNDARY v æ l j uː WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY t aɪ m WORD_BOUNDARY d ɪ ɹ ɪ v ə t ɪ v WORD_BOUNDARY ə v ə ɹ WORD_BOUNDARY ɹ eɪ d ɪ ə s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY h aʊ ɛ v ə ɹ WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ð ɪ s WORD_BOUNDARY m ɪ ʃ ə n WORD_BOUNDARY ʌ n WORD_BOUNDARY oʊ v ə ɹ l aɪ n WORD_BOUNDARY w ʌ z WORD_BOUNDARY m ɪ s ɪ ŋ WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY f ɔ ɹ m j ʊ l ə WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY l ʊ k s WORD_BOUNDARY s ʌ m θ ɪ ŋ WORD_BOUNDARY l aɪ k WORD_BOUNDARY ð ɪ s WORD_BOUNDARY