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problem. The pal was to Jcwgn ailightwei~ht. low colt.
manufacturable pacec craft ihlt could wpporl a fairly
lulmutuial (W ultra-li~htweighll *AR and bc cmpniMc with
the Delu II launch ryrtm. Tbc debign ii for an a f t e m sun
synchnmur ahil with M allilvdc Of appmrimalcly 370 %mi.
Ihe pi- dv pwr spin is appmninnvly 5 kW. and
Ihc SAR amy ir appuainutcly 12 x 4 nte~R. for 8 to%t c m
d 4 d. In thim pniculn dcripn. il is dcrinhk io include a
luge (6 faa, diameter). dud limb1 pointing pahnlic ~tenna
to rclny wideband SAR data to a gen(yn.Vronour
communications relay satellite. Furthennore. an X-hand
downlink is provided to enable real lime SAR data to he
Iranrmilled to operitional userr directly below Ihc
Ip8cecnfUSAb at any time. The entire Ipwccrafl. power
rysHm radar. p~pulrim syum. d dI arbmd ekrtmnics
me desiyrd fa an abiial lifctimc d 4 ye=.
’The very liihrweighl spacecraft fvr this appli&alion ir a
simp* lri~&~ wss amngenmtn. whcm5y thc SAR uny
ir lfftncd 10 OM of lhm rider of thc bus. md each d ihe
rolu wing 11 a~irhcd toone or the IWO Rnuininl rides. U is
lhmrn in Fipm 9. Note that in this filum. the hiring abow
the Delu I1 s e d u8;e has s I IO inch envelop for the
pylad ud ihe large reflccta utlcnlu is ab0 rmnmodd
within Ihc fairing.
Ague IO depicts this apaccnfVSAR pylod in the spndeployed
configuration. The SAR antenna 11 canted
rppahn~~ly 30’ OR thc horimtal, to pmnh s&-lonkitt;
1 STELLITES
2ORBilPLAMSATWI
MU mN ALTRUOE
FIGURE 7. HIGH ORBITAL ALTITUDE
~TELUTION
only. In this puikulu &sign. ~hc quimmtn am fa fwT
scat c.pMlily in Ihc ckvation uii md ran capbli~~ in
thc uimulh axis. Similu destplr haw alkd lor the amy to
bc dcploycd nunul b ihc euh’s ndiw wcmr to mac mdtly
um~ 0 thc right nd kft U the tywrcnll mua aIm8 the
abilal plh. In chr bar CDU. hc desim bve :ypkdly dkd
form d SCM in bah LICL