▁the ▁ 1 3 5 th ▁and ▁final ▁flight ▁mission ▁of ▁the ▁American ▁Space ▁Sh utt le ▁program . ▁ ▁Technology ▁demonstr ation ▁ ▁Ph ase ▁ 1 ▁NASA ▁successfully ▁completed ▁the ▁phase ▁ 1 ▁demonstr ation ▁mission ▁in ▁January ▁ 2 0 1 3 , ▁performing ▁a ▁series ▁of ▁robot ic ▁ref uel ings ▁of ▁satellite ▁hardware ▁that ▁had ▁not ▁been ▁designed ▁for ▁ref uel ing ▁. ▁ ▁An ▁extensive ▁series ▁of ▁robot ically - act u ated ▁prop ell ant ▁transfer ▁experiments ▁on ▁the ▁exposed ▁facility ▁platform ▁of ▁the ▁International ▁Space ▁Station ▁( I SS ) ▁were ▁completed ▁by ▁the ▁R R M ▁equipment ▁suite ▁and ▁the ▁Canad arm / D ext re ▁robot ic ▁arm ▁combination . ▁ ▁The ▁experiment ▁suite ▁included ▁a ▁number ▁of ▁prop ell ant ▁val ves , ▁no zz les ▁and ▁se als ▁similar ▁to ▁those ▁used ▁on ▁a ▁wide ▁variety ▁commercial ▁and ▁U . S . ▁government ▁sat ell ites , ▁plus ▁a ▁series ▁of ▁four ▁prototype ▁tools ▁that ▁could ▁be ▁attached ▁to ▁the ▁dist al ▁end ▁of ▁the ▁De xt re ▁robot ic ▁arm . ▁ ▁Each ▁tool ▁was ▁a ▁prototype ▁of ▁a ▁device ▁that ▁could ▁be ▁used ▁by ▁future ▁satellite ▁serv icing ▁miss ions ▁to ▁ref uel ▁space craft ▁in ▁orbit . ▁ ▁R R M ▁is ▁the ▁first ▁in - space ▁ref uel ing ▁demonstr ation ▁using ▁a ▁platform ▁of ▁fuel ▁val ves ▁and ▁space craft ▁pl umb ing ▁representative ▁of ▁most ▁existing ▁sat ell ites , ▁which ▁were ▁not ▁designed ▁for