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FIQURE 2. REPRESENTATIVE OPERATIONAL SAR SYSTEM<br />

3.l PFXCFIIME SPACB CONST,TEI.I.ATION<br />

SCENARIO<br />

Cmtraq b thc launch-on-demand ucnario. ihr rracctinn<br />

spscchmc radar ucnario mah uw of a -mall l.EO rHIar<br />

c~mr~ainn that pmvk horl ma IhcNcr wmh. a* wcll m<br />

high mnlulim imaginp upm thc dclcclin or cueing nl a<br />

tar:ct'* C'cwncc. Thiq sccnarin dncr niii prrcludc ihc<br />

capahilily to c~ecut~ a wgc launch In *uppkmnla p-acclim<br />

cnnsicllalinn or to rccnnhlulc thc *ywm aq ~~ICIIIICI arc<br />

dewmycd dump majw mnflici.. Thr cimlml nl this siiunkm<br />

. wnuld rc%idc in Ihc Ihcatcr cnmmmdcr who a1.o ha% ihc<br />

rcqwnsihilily and capahilily 10, rral :imr tarkin: 111 thc<br />

.pacchmm radar and ~pacrcrafl. In Firure 2. lhrrc radan<br />

npntm: in lhc SAR modc am dcpicicd. mr pwidinp .!rip<br />

map imaging in I wide arc8 urpi I*mcion mdc and the<br />

nkr tw pmviding thc hi#hcr mu,lutinn *lightme In nJri<br />

in chimlniring rmy iarylr that harc hrcn dcitxtrd. Mi*<br />

chmy tn*truinnr to Ionb. in diflrmni urn. lor cxamp~c. are<br />

cnmmandcd in real time hy IIK field cmnniantdr mnhilc<br />

cimtml uarim. n huh can alw xccp~ mhovrd pwc\utl m<br />

paniallr prnccwd imaging data fmm ihc orhilirp rrdan.<br />

kpcnding m Ihc lime lram el Ihc lint launch. lhcre iq an<br />

impurtani iradcnll hclwccn accnmpliqhinp a11 imapins<br />

pcwng mhurd thc rpcccrali. lhclulinp rnmprium nf<br />

input data to .lomi imap nf ptrniid iaryir. vcnuq thc<br />

dnwnlinkin: nl rmkr widchnd imapin: data fnr war real<br />

tim pmcrwin: in thc cnmmadrr's m wd rrmtml cnnudc.<br />

Thc Iallcr is mnsl likcly to be prrfcmd. until cnmplcaly<br />

reliahk autnpmn-in: d inulin: &a hn hn urmdully<br />

vrlidalcd. The implcmcntalinn nf an cfficicni widchand<br />

dnmlink is very rmightlmad and cm nm M thc mhrrrd<br />

ndar M y 10 pide the canrmnicalhr &nunlink apmum<br />

10 lhsl anhcr tnnuniturlmcnru nuld m k -q.<br />

The pwirinn nl a commander'* cm:mad cwwol c#mu*lc<br />

ur( d statim to usk ud crmd the nd wmw.<br />

pl"S mlkled data. n*l pmidc J.U 1u.m at quid i.<br />

an c.unlial pan dah mal qrnlMl ryum. ah# with t k<br />

Uidehnd mal time damlink imn ~hce uakm.<br />

unall aimnna lranuni18 a canmand la Ihc SAR In 'spotlight"<br />

a pnr(inn 01 Smn Charlie where unmnpnizcd cnmy arwir<br />

may hc hidden in a wmdcd area. AI lime 1.1. Ihc SAR<br />

SpuliQhlr k tm Charlie a1 high reudulicm. using I uinninp<br />

km. a d wcnmplirk mpcal Id- a nrrwry in inreme<br />

rrwlulnm. AI lim 14. a SAR plrrsud nr panialiy pmccrd<br />

imapc ir dnwnlinkcd I o Ihc mnhilc grnund rtalinn. which<br />

mvcaI\ a clu

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