▁The ▁Light weight ▁Multi - P ur pose ▁Car rier ▁( L MC ) ▁was ▁also ▁carried ▁on ▁ST S - 1 3 5 . ▁The ▁External ▁Th erm al ▁C ool ing ▁System ▁( ET CS ) ▁P ump ▁Module ▁( PM ) ▁stored ▁on ▁ESP - 2 , ▁which ▁failed ▁and ▁was ▁replaced ▁on ▁orbit ▁in ▁August ▁ 2 0 1 0 , ▁rode ▁home ▁on ▁the ▁L MC ▁so ▁that ▁a ▁failure ▁analysis ▁can ▁be ▁performed ▁on ▁the ▁ground . ▁The ▁Rob otic ▁Ref uel ing ▁Mission ▁rode ▁up ▁to ▁the ▁station ▁on ▁the ▁unders ide ▁of ▁the ▁L MC ▁and ▁was ▁placed ▁onto ▁the ▁E LC - 4 . ▁ ▁Rob otic ▁Ref uel ing ▁Mission ▁ ▁Atl ant is ▁carried ▁the ▁Rob otic ▁Ref uel ing ▁Mission ▁( R R M ) ▁developed ▁by ▁the ▁Sat ellite ▁Serv icing ▁Cap abilities ▁project ▁at ▁the ▁God d ard ▁Space ▁Fl ight ▁Center ▁( GS FC ). ▁ ▁It ▁planned ▁to ▁demonstrate ▁the ▁technology ▁and ▁tools ▁to ▁ref uel ▁sat ell ites ▁in ▁orbit ▁by ▁robot ic ▁means . ▁After ▁the ▁proof ▁of ▁concept , ▁the ▁long - term ▁goal ▁of ▁NASA ▁is ▁to ▁transfer ▁the ▁technology ▁to ▁the ▁commercial ▁sector . ▁ ▁R R M ▁included ▁four ▁tools , ▁each ▁with ▁electron ics ▁and ▁two ▁cam eras ▁and ▁lights . ▁Additionally , ▁it ▁had ▁p umps ▁and ▁controllers ▁and ▁elect rical ▁systems ▁such ▁as ▁elect rical ▁val ves ▁and ▁sens ors . ▁ ▁The ▁R R M ▁payload ▁was