istan . ▁The ▁basis ▁for ▁the ▁RA ID ▁surve ill ance ▁system ▁was ▁improved ▁with ▁the ▁development ▁of ▁the ▁G - BO SS . ▁The ▁G - BO SS ▁took ▁the ▁concept ▁of ▁using ▁elev ated ▁inf ra red ▁sens ors ▁and ▁put ▁it ▁on ▁a ▁station ary ▁platform . ▁In ▁addition , ▁the ▁G - BO SS ▁brought ▁the ▁addition ▁of ▁a ▁second ▁electro - opt ic / inf ra red ▁sensor ▁and ▁a ▁ground - based ▁rad ar ▁network ▁located ▁in ▁the ▁remote ▁ground ▁station . ▁In cluded ▁with ▁the ▁RA ID ▁to wers ▁are ▁t ether ed ▁bl imp ▁bal lo on ▁systems ▁( a er ost ats ) ▁as ▁part ▁of ▁the ▁Pers istent ▁Sur ve ill ance ▁and ▁D iss em ination ▁Systems , ▁which ▁later ▁developed ▁into ▁the ▁current ▁G - BO SS ▁system . ▁The ▁system ▁emp lo ys ▁a ▁variety ▁of ▁sens ors ▁t ether ed ▁from ▁the ▁bl imp ▁bal lo on ▁system , ▁and ▁later ▁evol ved ▁into ▁other ▁platforms , ▁including ▁fixed ▁to wers ▁and ▁re located ▁m asts , ▁which ▁addressed ▁log ist ical ▁issues ▁tested ▁while ▁on ▁deploy ments . ▁ ▁Oper ational ▁impact ▁ ▁Consider ing ▁the ▁majority ▁of ▁cas ual ties ▁in ▁both ▁Ira q ▁and ▁Afghan istan ▁in ▁terms ▁of ▁the ▁Global ▁War ▁on ▁T error ▁were ▁from ▁impro vised ▁explos ive ▁devices ▁( I ED s ), ▁the ▁need ▁for ▁surve ill ance ▁has ▁increased ▁with ▁their ▁increased ▁use . ▁In ▁a ▁move ▁to ▁counter ▁this