1.TheR-27air-to-airmissileiscategorizedintothreeradartypes:semi-activeradarhoming,activeradarhoming,andinfrared.2.TheR-27R/REvariantemploysa9B-1101Ksemi-activeradarseeker,operatingintheJ-band.Thisseekeriscapableoflockingontotargetswitharadarcross-section(RCS)assmallas5squaremetersfromadistanceofupto30kilometers.3.TheR-27AEmodelisequippedwitha98-1103Mactiveradarseeker.Theintegratedcomputerfeatures32kilobytesofrandom-accessmemoryand32kilobytesofread-onlymemory,allowingittolockontotargetswithanRCSofabout5squaremeterswithinarangeof16to20kilometers.4.TheR-27Tvariantutilizesa36Tinfraredseeker,capableofdetectingtheheadofthetargetandcomeswithahigh-performancetrackingsystem.Thisenablesthemissiletocloselyfollowhighlymaneuverabletargetswhilehavingstrongabilitiesagainstjammingandinterference.5.TheR-27ETmodelisanextended-rangeimprovementoftheR-27T,equippedwithasignificantlyimprovedT36seeker.