 xref sci space 61459 sci space shuttl 12959 sci astro 35294 path edu!magnesium club cc edu!pitt edu!uunet!digex com!digex net!not-for-mail from prb access digex net pat newsgroup sci space sci space shuttl sci astro subject re hst servic mission schedul 11 dai messag-id 1rrhlo ajb access digex net date 30 apr 93 15 47 04 gmt refer 23apr199316425663 kelvin jpl nasa gov 3t75nhg rpi 1rq3os 64i access digex net 1993apr30 101054 1 stsci distribut organ express access onlin commun usa line 75 nntp-post-host access digex net in articl 1993apr30 101054 1 stsci hathawai stsci write in articl 1rq3os 64i access digex net prb access digex net pat write in articl 3t75nhg rpi strider clotho acm rpi greg moor write as herni point develop thruster also lighter lift mass thruster orbit thruster lift weight higher orbit and room payload bai improv boost orbit hst signific understand what improv signific carri equip servic mission? also impli poster boost orbit mission anywai? mayb clarifi net? right hst sevic mission list 11 dai list 9 dai kick number spacewalk 5 simul indic do-abl 4 after space walk go re-boost hst's orbit sit 180 mile 220 exact orbit number hst flown highest shuttl orbit now shuttl cari thing call edo pallet extend durat orbit pallet it's lox lh fuel cell rc gear o2 canist life support re-breather nitrogen the limit space-walk function suit suppli mass orbit durat in order perform re-boost hst om engin fire long period now shuttl heavi thing the hst light the amount om fuel need fly substanti small booster carri boost hst weigh om fuel requir boost hst shuttl orbit chang from understand mass margin hst mission tight carri extra suit mmu's now small tug bet wild guess save amss margin allow carri edo pallet extra suit consum part flaki fg sensor part balki solar electron doubl magnum champagn hst sort medium orbit the reason high orbit antenna point longer drag life carri edo pack consum shuttl mission long arrai tilt motor god go wear from i've heard motor fine - set electron control motor the motor electron separ piec hardwar expect correct i'm wrong whatev problem tilt arrai big constraint hst op pat 