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Thc ADACS provido *ti!dc &lamhh ud rOnCm1 for
the QUK~SW rprscnh Ile ADACS udsu of I sur
caner& a 3.uU gym puk.ge, WO sun YM* I 3.uu
magneromcter. three reaction whl nmbliea ad drive
elecuonia. ud hrm que mdt. Attitude dctrrminui.m b
wcomplihd =in; inpuu from a undl. vidr4lcld.ol-~ icw
(WFOV)rol~-sutsswc~vn(viaIhcAfCPmd DMA)
when in the inulial pointing nIode ud the 3.uis WO
prkqe during uuking opetitiom. AttitUds conuol U
achieved usin; the nrtion vhcels while magnetic loquin;
U u d U) dump uod momentum in the whal.
The WFOV aur cuma yea reecntiy nncqing Ccchnoh~gica
in WFOV I-U md r=al piMC naitcning. n= resuit is
greatly simplified d bwscost IW Camera. Using the
marc eipbh IIU canen in lieu of E d nd sun M~OR
rcsulu in a simplified attitude determinition ami conuol
aubsystrm. With the rcluively simple ch.r;cd couplcd
device (CCD) 111 camera along with a mmpki loftwuc
pgrsrn he five brightest 11u8 ue send in the ficld,of.
VKW uul mavhrd ton m-boucl (tu cualng in cmpuie M
attitude solution. Usmi the new WFOV camer% the ADACS
ea wide wit& hwledgc to brtter thm 0. I degrees in
dl aaci. In additim. ita WWV capability allow he on.
bud UI caulog 10 bs under JW stus. t:ss minimizing onbnud
ilorsga and pnu rtq.liremcnu and rdurin;
processor biding.
During mrmal operations. QuickSur U maintiid in i Sun
Poiit MO& in which the molar panelr are positioned normal
IO he mn.linc for optimum pwcr outpu. In hi mode the
%UT cmwi is used f r ptimuy attitude deiaminaim.
Durinl main prcdctamined times, however. the Ipcmdt
ca k commuded Io on of wvad pointiw mode type,
such U 7rwk- or "Inmid-. In Track-. tho sprccrdt slevs
w hit the +X lab kvkr 8 pnlctennincd Erth fiacd or
orbitd pitia Win; Wi tima thc 111 c u ~ dua a U
unsvailsbk so spccnrlt attitude ia dctermiiud by using the
~ym
is a refnmcc. Attilde munlainlies mtinue to
~umulrte due 1O ~yro drift until (he end of he slrw and a
stu mncra updatc becanes available. The Trrk mode
opcrra with any good** laah vhclhcr m the fwc d Ihs
W w U ahiul altindr In Inertial: Ihs spcmllt is
pointed abng a mnnundsd lied bvnial VCMI. During hii
mod* the gym munairu M bodyaais raw. Aft- each
Trrk'a Inaid' maKuver. QuickSlr iC rnumal to 'Sun
Wit'.
Brk-up inindc determinuion U available using i 3-iais
~;neIometer uul tho IW nun sensors. Using Mual Eah
Tuld lii nJ aun dimtiau. sprecrdi hrfyub ittirudo
mluhru vi& uxuma on Ihs ordm or I Io 1 de;- y.
available.
An 0Pion.l clement of Ihc QuickSw ayalms b d m
m*li+yld rcqukemmu, is a lightweifit poprlsim
&pm dui@ 10 pufwm delu-webci~ mmers io
FIpun 6-1 QulekSWoprmUoonolgroro~nd station