▁the ▁meaning ▁" F ighter ▁aircraft " ▁for ▁the ▁Russian ▁word ▁ist re bit el ), ▁was ▁a ▁Soviet ▁anti - s at ellite ▁weapons ▁programme ▁which ▁led ▁to ▁the ▁deployment ▁of ▁the ▁IS - A ▁or ▁I 2 P ▁system ▁during ▁the ▁ 1 9 7 0 s ▁and ▁ 1 9 8 0 s . ▁IS ▁sat ell ites ▁were ▁originally ▁intended ▁to ▁launch ▁on ▁U R - 2 0 0 ▁rock ets , ▁but ▁following ▁the ▁can cellation ▁of ▁the ▁U R - 2 0 0 , ▁the ▁Poly ot , ▁Ts y kl on - 2 A ▁and ▁Ts y kl on - 2 ▁rock ets ▁were ▁used ▁instead . ▁ ▁The ▁first ▁test ▁fl ights ▁of ▁the ▁IS ▁space craft ▁used ▁the ▁I 1 P ▁configuration , ▁and ▁served ▁to ▁demonstrate ▁the ▁prop ulsion ▁and ▁control ▁systems ▁of ▁the ▁space craft . ▁Both ▁were ▁launched ▁by ▁Poly ot ▁rock ets , ▁and ▁were ▁designated ▁Poly ot ▁ 1 ▁and ▁Poly ot ▁ 2 . ▁They ▁were ▁launched ▁on ▁ 1 ▁November ▁ 1 9 6 3 ▁and ▁ 1 2 ▁April ▁ 1 9 6 4 ▁respectively . ▁Following ▁this , ▁IS - A ▁or ▁I 2 P ▁intercept ors ▁and ▁IS - P ▁or ▁I 2 M ▁targets ▁were ▁launched . ▁Only ▁four ▁IS - P ▁targets ▁were ▁launched ▁before ▁the ▁type ▁was ▁replaced ▁by ▁the ▁che aper ▁D S - P 1 - M ▁satellite , ▁launched ▁as ▁part ▁of ▁the ▁D ne prop et rov