0 - FTP Directory Listing - Nato
0 - FTP Directory Listing - Nato
0 - FTP Directory Listing - Nato
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
,<br />
1 SURUMARY<br />
Thispa~rc:.amincscanmunic;1ioJls~vepmgc from five<br />
non-aemLationary sarcllitc orhiu. 'OAcsr orbits an:<br />
circulm inclined synchronouc. GPS. Molniya 12 and 24<br />
hour. d Turidrn orbit. It also shows t6rt itwca... in<br />
pnpBr?tbn lms dlbe io imgufar tcmioo rnd t k foliagc<br />
loss at mm wavcs. IS wcll as t k conhid effcct of tcmin<br />
and foliqe m SoVlliu vicw duration. Po cnmludcJ that<br />
coverrmqc calculations fcr EHF WICO~ earth terminals<br />
med to &e into account lcmih and foliqe IOSJCC.<br />
. drgtce<br />
2 LIST OF SYhlBOLS<br />
minuu<br />
AMSL hvc mcan sca lcvcl<br />
CIS circular inclined synctirnm<br />
rt fcrl<br />
GPS gbhnl positioning systcm<br />
kft kilo-fcet (IO00 It E 3W.8 m)<br />
km kilomcot<br />
mi mile (5280 h - 1609.34<br />
m)<br />
Mol I2 Mclniya 12 hour orbit<br />
Mol24 Molniya 24 hour orbit<br />
Tun& Tundraorbit<br />
WA Washington Stale. USA<br />
3 INTRODUCTION<br />
Gcwutionuy satcllitcs on cxpcnsive. affnrd pcmr<br />
visibilityand degradcd performance in ~k nmkm zortcs<br />
and may bc not have covcragc ovcr a specific theater.<br />
Lightwei8ht salcllius tactical salcllitea (TACSATS) in<br />
non-geoscationuyorbiUforuseovcro~iTrc thcataare<br />
M altanruivc.<br />
Salcllite "footprint' eslirnatiorl invm hbly ignorcs the<br />
effcctoftdn oncovcragcand comm"akt?rians'4'.'"''.<br />
This is justirublc whar the car(h tcrmid is in a bmcn<br />
hat Idn. and the mtclliu clcvatim' mnglc is high.<br />
However. lhcn my bc considmbh effect of the<br />
surrounding irregular (errain (mounmhs), in pmicular<br />
whcn L)rr mlcllik ekvation angle is mall, on<br />
communkauims wilh a manpack, B s h i m ur 81<br />
mnspasPnb!e mind. This paper will anmine the cfk'ect<br />
of 1-n and foliose on canmuhiccaimc3 covcqa or<br />
eanh terminals with ncm-geoscoti~ mw91iPer.<br />
Dr. M. JnmlB Ahmod<br />
Mm Tcltcch Lld.<br />
8 M W e l . Way, ~ Bumaby. B.C.. Cansda V5A 485<br />
,<br />
I<br />
16-1<br />
For w~~cal m m s . LRcrc is a necd for communication<br />
that is ovhilablc continuously. is secure. hac low<br />
probability of intctccpt. has nuclear survivability. is<br />
immunc to EMP. has anti-jam faturcs. and is rcliuble.<br />
Rcliability is dctcrmincd by sysren ovailubiliry (99.99%<br />
ctc.) and is dcfincd by he systcm spccifications.<br />
Although atmospheric absorption loss. cffccr of min.<br />
nuclcar evcnL jmiming, ctc. arc includcd in he "fade'<br />
margin. the eflccccu of tcmin and vcgcution arc usually<br />
ignored. Inclusion of tcmin. ohslruction and vcgecation<br />
lawswill dcthc sysicm spccificntions morccomplcu.<br />
so these losses m cxclmincd in this ppcr.<br />
4 NON-GEOSTATIONARY ORIRITS<br />
, Thc TACSATS may use polar ortit.
Change language