, ▁due ▁to ▁th under st orm s ▁and ▁very ▁low ▁ce il ings ▁which ▁prevent ed ▁the ▁surve ill ance ▁plane ▁from ▁taking ▁off , ▁this ▁launch ▁attempt ▁was ▁scr ub bed ▁and ▁the ▁next ▁attempt ▁was ▁scheduled ▁for ▁May ▁ 8 ▁during ▁the ▁same ▁window . ▁The ▁May ▁ 8 th ▁attempt ▁was ▁also ▁scr ub bed ▁due ▁to ▁th under st orm s ▁and ▁heavy ▁rain , ▁which ▁once ▁again , ▁prevent ed ▁the ▁surve ill ance ▁plane ▁from ▁being ▁able ▁to ▁take ▁off . ▁Another ▁attempt ▁was ▁scheduled ▁for ▁the ▁next ▁day ▁on ▁May ▁ 9 , ▁again ▁with ▁the ▁same ▁window . ▁Although ▁the ▁weather ▁co oper ated ▁better ▁for ▁the ▁May ▁ 9 th ▁attempt , ▁a ▁launch ▁support ▁equipment ▁problem ▁caused ▁a ▁delay ▁of ▁approximately ▁three ▁hours ▁past ▁the ▁scheduled ▁launch ▁time . ▁This ▁problem ▁was ▁resolved ▁and ▁the ▁count down ▁res umed . ▁However , ▁with ▁ 2 ▁minutes ▁and ▁ 1 6 ▁seconds ▁left ▁on ▁the ▁count down ▁clock , ▁an ▁unexpected ▁hold ▁was ▁called . ▁Several ▁minutes ▁later , ▁this ▁launch ▁attempt ▁was ▁also ▁scr ub bed ▁due ▁to ▁low ▁elect rical ▁voltage ▁on ▁the ▁A GC ▁of ▁the ▁Fl ight ▁Term ination ▁System . ▁A ▁new ▁launch ▁date ▁was ▁set ▁for ▁May ▁ 1 9 ▁with ▁May ▁ 2 0 ▁as ▁a ▁backup ▁date . ▁ ▁The ▁space craft ▁was ▁successfully ▁launched ▁at ▁ 2 3 : 5 5 ▁UTC ▁on ▁May ▁ 1 9 , ▁ 2 0 0 9 ▁after