Project Cyclops, A Design... - Department of Earth and Planetary ...

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CYCLOPS PEOPLE Co-Directors: Bernard M. Oliver Stanford University (Summer appointment) John Billingham Ames Research Center, NASA "Syste_ [_esign mldAdvisory Group: James Adams Stanford Ufiiversity Edwin L. Duckworth San Francisco City College Charles L. Seeger New Mexico State University George Swenson University of Illinois Antenna Structures Group: Lawrence S. Hill California State College L.A. John Minor New Mexico State University Ronald L. Sack University of Idaho Harvey B. Sharfstein San Jose State College Alan I. Soler University of Pennsylvania Receiver Group: Ward J. Helms William Hord Pierce Johnson C. Reed Predmore University of Washington Southern Illinois University University of Missouri Rice University Transmission and Control Marvin Siegel Jon A. Soper Henry J. Stalzer, Jr. Group: Michigan State University Michigan Technological University Cooper Union Signal Processing Group: Jonnie B. Bednar Douglas B. Brumm James H. Cook Robert S. Dixon Johnson Francis Ltth Yu University of Tulsa Michigan Technological University Cleveland State University Ohio State University Purdue University Wayne State University /i
Page 1 and 2: (NASA-CR- 11_5) PROJECT CYCLOPS: A
Page 3: CR 114445 Available to the public A
Page 7 and 8: FOREWORD In addition to the finding
Page 9 and 10: TABLE OF CONTENTS Cyclops People ..
Page 11 and 12: 9 THE RECEIVER SYSTEM .............
Page 13 and 14: 1. INTRODUCTION Each summer for the
Page 15 and 16: llt,al 10o lmJagD 2. LIFE IN THE UN
Page 17 and 18: thinkinghasattainedsomestatusof sta
Page 19 and 20: GALACTICEVOLUTIONANDSTELLAR POPULAT
Page 21 and 22: MAIN SEQUENCE SPECTRAL CLASS 05 BO
Page 23 and 24: planetsareformedin a secondfragment
Page 25 and 26: nothingspecial abouthesolarneighbor
Page 27 and 28: Black at NASA's Ames Research Cente
Page 29 and 30: intooceans, andwiththesmallerUVandX
Page 31 and 32: essential component of someof themo
Page 33 and 34: development and remainedlittle chan
Page 35 and 36: intenseclimaticchange, or competiti
Page 37 and 38: the present rate. This means that t
Page 39 and 40: THEPROBABILITY COMMUNICATION OF INT
Page 41 and 42: 3. SOME REASONS FOR THE SEARCH It i
Page 43 and 44: culturesin contactwouldbe: 1. Thedi
Page 45 and 46: 4. POSSIBLE METHODS OF CONTACT Seve
Page 47 and 48: hadbeendiscovered, it couldbegina s
Page 49 and 50: 5. COMMUNICATION BY ELECTROMAGNETIC
Page 51 and 52: In general, if the receiver is not
Page 53 and 54: In this expression (Br) is the numb
Page 55 and 56:
1012 Assuming the receiving antenna
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asshownin AppendixD, if thenoisein
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Theprobabilitythatthethreshold isno
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Siliconphotodetectors with about80%
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practical limits of narrow beamwidt
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6. ACQUISITION: THE CENTRAL PROBLEM
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lO II Substituting this relation in
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the other planet, and (3) the rotat
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Butdoesbyourtechnology andourassess
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islessfor shortranges, increases as
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whereb, = (1/2 star power in bandwi
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themselves aswellasdefinesymbolsto
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and of transmitting signals to and
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operation is important. The propose
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sec,therebyobtaining100samplesof th
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iO II YEARS 4 5 7 I0 15 30 r 1 I F_
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F kmJm 8. ANTENNA ELEMENTS A tremen
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If thesurface irregularities are la
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ELEMENT COST VERSUS SIZE Here we pr
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i0 8 one-third the 3 dB cutoff freq
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4. The VLA : A Proposal for a Very
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ands, each covering a 1.35 to 1 fre
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where 0 is the angle off axis, and
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Wealsofindfromequation(7)that = 2I
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Throughtheuseo1"thetechniques descr
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shownasa roomtemperatureMESFET(Meta
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frequency f by n may lock in n poss
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arenowsentoutover the cable. At the
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I GHZ INPUT DIRECTIONALCOUPLER - TO
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alent to $200 per antenna and is so
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106 %*
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o o TABLE 10-1 c----o o o 0 o Relat
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dB/km)havebeen reported, a great de
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,,_Td d a a c c b b DISTANCE Figure
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phase stability resulting from divi
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systemas for the IF systemitself.Fo
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asa result of a uniformly distribut
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1%of theantennas in the Cyclops arr
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un about $225/kW. We will assume $3
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crosspowerbemadeusingtwosignalseach
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and the required calculation time i
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arriveon thehorizontalaxisa little
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needto process this spectral inform
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Weproposeinsteadthat the databe sto
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compositesignals to be formed at in
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3. N = 10_ analyzers, 1 Hz channels
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Assuming we can tolerate a 25% incr
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one-half frame between samples. Eve
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ightness distributionoverthecommonf
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andis the (discrete) two-dimensiona
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We conclude that none of the above
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t.o TABLE 11-4 ,, ¢: WAVEFRONT i ]
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only±0.07;_ up to p[a = 1.77. Beyo
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y equatorially mounting the antenna
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Whenwe spread the elements to point
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function of the spectral class and
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classboundaries have been noted alo
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Cyclopswouldbesolvedbydesigning ani
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factsaboutthe Galaxy and the univer
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REFERENCES 1. Dole, Stephen H.: Hab
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47or81.ThiswouldletusmapVenusandMar
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wouldbe the relatively low cost ava
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studies, sowefeelthefollowingstatem
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a certain fraction of the time duri
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SUN Radius(Ro) 6.96X10 s m Area = 6
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THEUNIVERSE Rateof recession of gal
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ture societywith its mastery of con
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predictionsaboutworldsnot two thous
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INTERSTELLAR CONTACTANDCULTURAL LON
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introducedandtheorderof theintegrat
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186
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the component I r constitutes the s
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S B2Ps2 -- = (D16) N f/_ sin 2trrf
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Comparing this result with (D27) we
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x/eeoG + Ueo2 o = (D42) while that
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distributionsafteraveraging samples
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kt foo N --T j ° I_(_)+K(-_)]__I°
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There are 24 members in the base st
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casingsof pistonP2 and P3, respecti
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coverage is limitedto at mosta 30°
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APPENDIX G BACK-UP STRUCTURES There
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H-2baccomplishes this. The maximum
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The polar equation of the secondary
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(.9 Z 2zr F- h.i t_ 7"/" W 'I" n O
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® LsB ..... sB d' For co, = 25 MHz
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acorresponding reductionin tunnelin
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TABLE L-3 r=l r=2 AC = $566 X n X s
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and for 2b: L2b = 8 (2-v%- S II 3/2
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CASE I - PERFECT LO PHASING AND DEL
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is the low pass equivalent of this
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For the arguments to be equal we re
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apparent that some sites are consid
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Define Nowlets(t) be a sinusoidal s
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of this spike gives fine frequency
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The delay relative to the delay at
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Conversely Zo = _ x/Z-_ --} 1.095x/
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I TIO T SAWPL[ o I (z I _10 -I Lid
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J '_--_-o._ ,_-_.r_-_.. I _ 1 _-_..
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(/1 i .E cn _J (E 10 3 10 I01 I I01
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