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REPORT NO A W - 1 3 7 

BATE: 

Febru;.:117,; i963 

(7. 

Y.IL I11C) '6 R u C K 

E 3 1: 

T E 1-i 

Prepared by: 

S. D. Oros 

Approved by: 

w. Harris 

TNIS DOCUMENT CONTAINS INFORMATION AFFM. 

TiT4O THE NATIONAL DEFENSE OF THE UNITE° 

STATES W+TEON TNT MEANING OF II-4E ESPIONAGE 

tAvds, Iii LE IQ IJ C , SECTIONS 793 AND 794, AI 

TRANSMISSION OF /RE RCN/ELATION OF ITS CONTESI5 U4 ANT MANNER 10 AN UNAUTHORIZED 

PESSON PAOH S'Y LAW. 

EXCLUDED FROM AUTOMATIC 

REGRADING; DOD DIR 5200.10 

DOES NOT APPLY 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

AVY-l3 / 

; 

r ` ^` ' °^ ^^^^^ 

O 0 0 0 0 • 3 6 • • • 

' 

0. 0 0 0 0 • a o o 

0040 06 40 • 0 

0 0 0 6 0 • • 4 • n 4 0 n 

- b*0 e • 0 • • . • • _ 

5- KY411'.::, 

-r:on.-rir•-t•ator 

7. • 0 0 

CCIZTX * • 0 0 000 ***** 

13:..(. ,'1„-.7.,7,., SUP-37"017,T 7):::!.1J _Tisii17,-.,2T? _ • • 0 0 

' .i.‘.1..a. c .-- 71.11. „ 71.e e e iv-i '. lc; , "..i.c.:(.: °I-dd.:I..; • • • • 0 

Data ?ror.-.e. F.; si...rii-.', . O 4 0 6 DI V b 0 0 0 

0 0 4 9 1

, • 

0 0 0 V 5G 

0 0 • Or :,-; u 

6 • 0 • 50 

• 

SYS ...... 

C E C 

C. 

I. 

2. • 

D. 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

ET 

yy- 

• 1;7 rf tac ra6dc 

2 

lnd the oter a 

,..57:•row t:15 

and to iand 

v y. tHr: aortdch ahrl I:The receiYer is a 

and inc0333rate5 no sr.,”Icial 

thc, bzload portior, to furnish 

dat: reeived 'oy the wide 

:t..,a••,•1••! 

Nur:her of Jniti 21aa7-;.0.3: This s-yst,,:- ih the R phas, and to date 

oniv one anit ha2 Otdit. seond an,1 third units, presentl,y uhear conscti3::, ef the first unit, leut, in 

addition to the rPceLvf-r, adde another module 

cchArtn, ef a traelin„;n yetL'.)o This amplifier 

seiti_c;s wj.th the 6trice ths lo9aeo in the 

the pad, rLisnatc, ralee the senziti-Aty of the 

f;civia.u channel, and it L5 felt the freqnenoy determination 

Val he much improyd Lncreasih thc sonsitivity the scannini; chanhA Presht plans do hot extonri L•eymr; the third unit. 

The second unit is scheduled for Mry 1963. 

-77.77 4 ) 
-"-- 

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1 AUGUST 2015 

P,ricrJ.ption 

platforit. Opera- 

- icro 

,;•.;. - -t-,11k..--.:1.7,10 tape racorder. 2

of a ,.-- T.-)r,7 -stionr,t1 

tracin:--'. 3nd readout stations at 

_ . The recolv,Jatn io re 

,21a4r.otis - ro,.:orters, :Ind the data is 

,e.nter at E'.!nrcpm1e. The data is 

form ::ikrit.,ablo for anal,2-,71 

tbtn to tl-fo 7o1.0o, 
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1 AUGUST 2015 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

OaejVrr: 

•.• 

I' an.f,ca 

• I • . •• I, ";.:'•■:: 31 t> ' 1""..3. Zan. 

- chir,n; oT the 

: ?1,7. ?. 

, • 1. a 1 1. a "..1..:;2..z•:.:3y • o1A 

• c, 

r;.•tlo is 0 '2;r -,

•) te. !„„ Tk 

a7J:1tset a patterns vs. irequenay is 

inal,AAe;' i tie CalilTation section. 

Loei The to =3.ntenaas are mounted on the 

Ttr(3 side e Fr::t4ilite whose attitude is 

st:Adlizara with the lanj.tuinal axis tangent to 

the orbit. The relative position is shown on the 

Antenna Ooordinate Pi:vran, alon with the pattern 

orientation. These patterns apply- cnily to a vellio2L6*4 

hose a•(,Utade 4tn roopect to eartZ is that eh - 

in the diaum. The .',.•eaond flight e ymouth Rook 

will be on a 7ertically stabilized (nose earthward) 

vehicle. Another set of coordinates and patterns 

will be supplied for that vehicle at a later date. • 
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1 AUGUST 2015 

"..eceivef 

a, 

rencJvnv desined to illustrate the 

Tic project was spoolatio- of t:I&InicrAen sult..;)'61e for possible .

roconiAtaaance systems With two 

ti: ic 

:L ?0 a ;.'-0;c'0 ,1 tc:&nique wnie:, could simultan9oaziy pnwirje 1.:robabliity- and a frequency - 

.:Yeasurement capobijA!..,y; and 

2„ To interlto b .roorAver n: to an ox7:Lsting readout, data processanayi 

Purformanco cbcctivoc roro to achieve as hig.h a sensitivity as possible .;onsistent with the state of the art, and to preserve p.r.f. and scan 

ampli.tude information for data processin. 

The receiver characteristics are "listed below. 

Plymouth Rock Receiver Characteristics 

Frequency Range (Gc) 

Tangential 

Sensitivity (dbm) 

- 3 05 

?.0 ).0 

swept channel 

wide-band channel 

-45 stompt channel 

-50 wide-band channel 

Frequency-Measurement 

Accuracy (Mc) 20 (net Filter band-width) 

Size (in.) • 9 x 11 x 5 

Weight (lb) 12.5 

Power Consumption 5.7 watts 0 +23.3 v (360-ma peak current) 

4.3 watts a -23.3 v (260-4ra peak current) 

Operating Temperature 

Range (°C) 
A W- 1 3 

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1 AUGUST 2015 

sPe: ca,): AZ:--04rz,,,Wert • 

" .".1 

A 
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1 AUGUST 2015 

c••••-..„-L•r.,;tai--videc 

ovor t..hn 

dbmo 

411 t 

:Zeceil.Ter.-“„ 

'6u- nc.d„ 

ovE:r to 

; la.• milli1•Li han6. 

-,--;r1.7.L:„-..• p r th 7117.! t.e.r 

Voi.s t c Filter skrts are not 

c F.-oy a wilc:r 7,!.)paront pas1 - .1a1d. -

ri of -11ree syrCtroninilx; pulso3 is 

e 

apsr1 el,tY)ut d,..trinr; the m !1.jle of the filter-fjY. ack 

reoovery. These .!ou'l3es are used in the recovered dp..ta for synchrorizIng 

the data proeessin c Li addition, pos3_tive-polarity baml-en 

marker pulses aro gentr:Aed at 2. and 3. (c. Trequency is detemined by 

meamrin the time di;Irraaccrdint of the intercept from the band end markers. 

Monitor ciruuits are included to pemdt extemn1 teete of varios 

power-supply-regulated voltr.yef:, wave forr and tompemture-sensinr, probes. 

Teyrature aensinir of the Yll filter is provided to permit internal .1...rstore? compensation and external second-order correction of the tea-perAureeitivn YIG-filter tunim:„ ealiration. 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

41- 

r:„ jay 

at 

the ic 

a 

C iJt 

3 .Lft 3 the 

tamLcr fref.Tuency. 

naa is at t,hP 3-,11) point3. 

arc b0tin;°„ 

• frcque1:7. Ourve.', 

In a:1:Ation, rust ,,ned at - input and ca ut 

t,o cbt.11. 1)andpass 6-db sttnuiltor is desirable at hot:, -Jie 

aaa outpc'(. noata ua as, a conomiAl between ni:,h usnaitivity 

bandpa:;s :,:hapin, one 3-b ett.onliat•,nr 1,yas '_12,..?.d at the filter output in t:'e 

rec6ivcr. 

The compoite frceuene:i respells() curves sho-a vreouer:cy response of 

both channels of mior--oas coponcnts in the receiver. The distortion 

the 1.-,.andoass curve because of 7Asnatching ic cvb dent in the curves loe:UY4 

?roil an over-all B7stem 1.-K,int or view based on intercept probabilir, 

related Lo 3-db bancivrldths, Lntanna-pattern bearaid lao, e'r..,-C! • $ 

di.Averence in scmoitivi ty between the two channels is -somewhat .greatJ:x 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

11 - 37 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

VV , 

-,ra.otw-Ist-tes11-1. larg,e 

rec(Aver so that the 

adverse ei'ects of 

aPplifier ud had 

of -5'h dbm st the 

noise 

01.5 v, 1evs13 

level:3 the bandma:: be acco,anted for in 

-HTcc regt. thf, crystal -- an iL 1OR crystal, 

a r.',J.4.rel).0.1:• scicctd 

;soA t-).:Lrature stability ,Jith respect to small sual :ain aad 

sc>n.oiee ''tie over a -5D° to -1-5J 'o,ngo was obtained by use of a Fenwal 

taistoruhich provtied appropriate cenensation of the login-diode bias 

current as tt-,mpeure increase;.i. F,tensive use of negative feedback mini1- ta fall-off o: the indi:c,-idual transistors as the ambient temperature decreased tow2rd -50a(% 

The small si.nal gain and bandwidth are essentially optimized for the 

overall am pier when the roon-temperature bias current through the loping 

diode 'Is 10 iicroamperes. 

xnonantini stretchin of the pulse cutout of the video ,mplifiers was 

desired in order to drive an outpui, channel of -kc bandwidth. In addition, 

'the dynamic range of the outpul, channel was presumed to be small and of 

limited use in pve6ervinE si,,n,R1 amplitude; therefore, some small-signal gain 

along wits amplitude lixiting was inc_o_sporated_int,the stretcher design. 

-----H--f—e _ 4 ++ 1 

„.,,4 

4P: .4. 

"''._nn•-"''''... 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

A V- A 3 

Iittl_ nr 

0,0 , tan,7,ential 

-1-e'-

,ent an in- 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

"*1 1 3 / 

in T55 cul-rent tuned 

had 

v33 Md, requi.rod 

d' Yron iI62 tr,) +250 ma. Ths sweep ,.enera- 

:71rJo0 th,ot sets he 

a bipolar saa-tooth 

th;r1t i1-.born; mad (s) a 

direct that aaali the low-lca 5n-tooth wave - 

fern 1Uter tunln 

i1I marer and :5yrict pulse generator. This 

resi -en.ertn Lao posItl.ve eon at t;'.ie start and .3top c!: - the smep 

to Ideet-j-• the f:xtrox:?e endo the frc;verc:,/ hani and three equally spaced 

Oorir, flyback., for the purpose of synchronizir; 

a .rancy-display 4 Los 

The 10-cps sloopis a, ireerusluing multivthrator which uives an 3-sec, 

lli-v, positive output pulse every 0.1 sec. The F.',-msec period is that time 

required to reset the YIO filter from 3.5 to 2.2 ic using a monotonically 

decreaaing discharge path. During this 8-rrLsec rerioci the bipolar sawtooth 

generator is clamped to its most negative excursion, which 13 adjustable, 

and sets the startkn,7 frequency of the swept receiver. The bipolar sawtooth 

generator also has as slope contTol, which sets the uppermost frequency of 

the receiver. In this case the ilipor-sawtooth enerator was set to sweep 

from -3. to +5.1 v in. the 92-msec period.. 

The ftr:at-coupled power amplifier is more accurately- described as a 

1110 direet-cosied:, bicolar, voltage.-to-aurrent power amplifier -- it converts 

the output of the bipolar sawtooth generator to a current sawtooth swinging 

between 450 and +250 cia to sweep the YIG filter froz .2.5 to 3•5 Ge. 

,0,4? 
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nnutooth 

is 

The 

:rom 

wi.dth is c't)tained. 

har-u7i“ marki,'r ,u1.3o$ and 

o strnhe,j o,:toW6 of the rec;ei-fer. 

The 1 3et, oC Y-1:.; filter 5lov.r7'.2.r. 

b:polar icuoc Le s-,mep that starts at 

4 voitac. to ,9 positive vole. It is 

posJ.tive :'U U1)-<17 clock, which controls the 

tf the Th.c? ha:.3 an iahcrent temooratre-denendent 

u%ch in a tranelan in the entire tunim! eqrve rather than a change 

to [,:i.opo; hence it ray 1:e. eimper.satd for 14r deliberatiqy causia57, the ssepin. waveform to 3hift in the opposite direction. This compensation was -

complished in the :,,,reepr by ri, flecting the .1 sired compensatirw; drift t,ck 

througli to the bipolar saw-tooth ;-.enerator and designing the circuit that 

controls the starting point of the sweep, such that at this point, the appro;iiriate, emitter drifts in the desired direction and at the desired rate. 

• 
o-ut for possible 

Mtreon pnnitor points are used 

the •:.e,:'.eiv•sr. The resini.A two are 

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1 AUGUST 2015 

!TiUhin the recoiver. A 

in. thir, Calibration section 

(rh. 

volta„- es frcom 

v'• P •o each stretein;;7, cIrcuit 

rso:•:to:-' Asoisci voltage is aa,2lied to 

on th:lt all r,ositorsd. voltaf,es appear 

at it2- at a. wen 0 nnP +C v. 

- The 10....cps c1ocJ monitor 

or +7 V, 'At:13 )0 prcent orobahility that it 

The output of t:ie bipolar ssmtooth is onitored so that a portion of the 

sec waveform will be sasapled with r,he liaLLts ranging between +0.h an:: +4.2 

v at 2 °C. Circuitry is provided to insure that the monitor voltage will 

remain within the limits of 0 and +5 v. 

The outriut of the Ira; Alter sweeper 1.s monitored on our successive .

monitor poinLs. Those points allow one to rPconstrt.ct the swoep by recording 

only a few successive comtato7:. re'rolutions. The /iNits of the seep 

should be 40.5 and 4.4.1; V at, 28°C. The cln_litry is identical to that, ased 

to monitor the output of the bipolar sawtooth generator. 

Temperature Monitor Circuits - The design goal of thn 

tempc-turc monitor circuits was a 0 to +5 v response for a temperature range 

of 0° to 50°C. The teripeveture-nonitor circuits actually gave a 1.1 V to 
NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

A Ji 

111111111M 

of' ori';-,or output o1 er 

was mounted on the cir 

clements. 

• 
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1 AUGUST 2015 

• 

J,y.‘12. Ln thll; 

lc ,eHtL0Oa 0i:: 

' to 'c,hic 

ee tHc aTilAah-Lt 

. • co-:•tecule;nts 

:.- t•-•.:•,cicrn, the 

tho monll,or 

0;7-Trecties to the 

1:he. 0? :'nnitor points trhen . 

hermca 711! o :.yicaI 3oquential arrrrk: he they wesAnP. cat an. analog 

entatAc, ech no thA eined Cron the output of a 

k)cp:f': dtncr1notoio, leo neaaein thic :ate, it. 1c necessary to haw. 

iO3tnant,ation ochodule for the particulor data link used. This schedule ideetificc the data oint nuY,er and its correconding function. 

?:-equehey Reaelout Cal:Corationa The center frequency f of a signal 

within too t:nning range of the receiver maybe determined by measuring its 

relative position. betwee the two hand-end markerF- In setting up the 

oscille3copn for frequency readout gurposes one should: 1) trigger the 

osoillcope on. the three negative sync pulses prc)vided; 2) adjust the 

sweep :>peed of the oscilloscope so that there D.h-cm deflection between 

the tnxi band-end markers; and 3) center the display, thereby- setting the 

two ban- I-end markors 0.2 cm past the two eKtrem ends of the normal 10-cm 

grid. With the display set up in this manner, the band-end markers, in 

effect, cue at 2480 Nc and 3t2) Mc respectively, and each c,f the vertical 

reticule lines indicates a 100,Nc increment starting at 2.5 Gc and ending 

at

GLCR Ak". • 
31 NRO APPROVED FOR RELEASE 

1 AUGUST 2015 

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1 AUGUST 2015 

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1 AUGUST 2015 

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1 AUGUST 2015 
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1 AUGUST 2015 

lo r,lyst3r-) 

reerv,e 

f 

•.- 

1 

......, 

to 

12 :: 

recon'ler to 

to control. other 

r,r t,o 

co; 

00.newave fregaeri 

Cp'..= vs,5 :...)riation over band. L, .-

cd:, -1...o 1 

IR,o 3Ar-, 3 rierik• no-13.ie 

ciutput hood of '1.)0 sps to 

13743e,-)0..j'ic;e2 

CJ) (3; :10'3 re 1. .7,3 at I 

The recorder will , t•L.et, oil. f3 3.,:3 C. tr" 

perf ormanee ratinirelitents oroutput.L outinat 

io.f.vied ri. t 11.".)jn: elms 

1 volt 
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1 AUGUST 2015 

nAt r. , l'Eazurd at 

1,0 1 I vcat, input0 

fro:;.U to 

for .:"1:nth 5`,o&-: do not include )

6 Cu4,at,cr: Thr. s;,4%wi utilz.s fift4sen points on a 

0.-0 -.26.'en-Itor to :)re-crt and fnn^tional information durin 

dnt link i td.on. Tho -)n.to Profile fornn n nort of the calibration 

lroormation 'itoimed in ?notion 0.3. 
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1 AUGUST 2015 

A 

'r'ao .1,rideband. onannels 

,a siF.71,alo pived 

3an lweJ, Jc 

u.3ina, two da..,a links, by ba-3E1 Zmne, 

a channci X and a c'aannel subcarr.„ require eni.oo& 1:1:::c transmitter, Teats 

noise ratio or t:H ciata i3 1iv3'o- ve6 

t1cl17.1e e kHof two 

aon:;ervs . sc that tne aata 

1074 5u'ocar..i'ien..; for roal tirle otattn:: L t 

In for tbe insortoncb erenoe tone when the 

non 2he trrasmittui on eentiastdtDnAl 717 telemetry 

nnc', roor.'ej the arc readout st=ations, 

B. a. CONSEC Flans* The analov, data i8 transnitted in the clear 

on the data lin14 but speeded up 3 tines, due to the RO/RI speed ratio of 

the recorder. No encipherment is presently-planned. 
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1 AUGUST 2015 

--2port 

Track-17w,, ..e,-.;o17 - 1 The Batellit,e platform is 

hhe kir ?orce. 

s;:•ationz of Kodiak, 

Acoasion or Thule are not 

the 2- tfwr..2 cah he read oat at any of the 

:ince soven track 

2- ceer:7ern arc .,:apa:)in recoring the .lata. 

!t.a - T-cing: Th ethod of processinP; the data was 05*. 

hriinh;n1O,;C.er firt rcei7er ecre rsthncd. Therefore, the receivers 

14ere -neJ In fasn that the dat;-, outputs are co7;patible with the 

d_at Th tar analo-: channels are separated from the coinposito tolemeterel ;lata, nizeriminated 11' necessary, and re-recorded on t 

trochs of an instrumenttion tar e 2ceorder, care oeng taken to maintain 

tire relationship 'cotwoch the twe tracks. For p7,rposes of Analysis, the 

nagnetic tape is then played back and the output applied to a dual gun oscilloscope. The out-put :'rom the swpt, or Y10 channel, is applied to a ttsynchn 

detector which recognizes the group of pulses occurring-during the flyback 

portion of the sweep. The output of the sync detector is applied to the external sync input of one channel of the oscilloscope. The hand-end markers 

and the analog data are then amplified and applied to the beam intensity 

modulator of the same channel. Intensified markers d11 appear at the bandends and wherever an intercept is noted, the intercept marker having a position between the band ends correspoudin to the frequency of intercept. 

C C E • 
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an t,''.. .E riand 

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a paper 
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t.i 
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expected this system fov the epecified 

cr' an fiften ray; hlgn. Since no statistical 

't)eeu perf'o. nthe eo:ouena a numorical figure is meaningTez.3, a5 worl au encdeerint ri llowever, equipment 

cif can.:Idruction. idar,111 com ones parte haJ survta-ld ascent 

ati,7 ;:u1-•. , romo.ri., and aerabed fan a period if: excess of the fifteen 

3.: cn1 after '2, con tar aplicabic parecrapha of MSC 6117B 

F;p-2-cifie.tion. Since recor'der, telemetry equipment, command 

oquipment, poer supplies, eo., have also survived stmilar conditions, we can 

expect tha!': there is essentizlly a 100% chance that the Plymouth Rock System 

will perform its function for a fifteen day mission. All flight designs are 

tented to 6117E, 

The oontjxlence to '•.).,e placed upon. the validity of the data of Chia 

1).:)01 - ,1 the J.‘,.U.;..,Wing fac tore 

1. The precieier, with which the calibration curves wore plotted. 

Since this in R lanoretory procedure, conditions can he well controlled, and 

the instruments used for the riurpone are carefully maintained. Therefore, 

the cali'eration error can be presumed 3maii. 

2. The error in the telemetry instrumentation. Since ultimate 

precision depends upon knowing certain operstinc volta es and. temperatures, 

it is important to keep the T/M system error to a minimum. With care, it is 

possible to determine monitor valuer to within two percent error. A worst 

case error 1P)uld he on the order of five percent, for example. 

3. Tine error caused by repeatedly recording and repredt.sing the 

data. There is 2:1) speed compensation on the flight recorder, and no reference tone recorded on orbit. While the long time stability of the recorder 
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f11;„;,,, recorders crc 

tempera 

r : .1.73 

rrL :.,,sanr,111;; prennt:3 thc. 

r i;. L equipaent *stem, In ac...1„Ition to 

i5 affF.:cti ey tLe 

nametio of mai;notic f;;ateri:11 or cet1cfields 

t .................filt cp can iove te offt ()1:. shift the .,queaey 

calibration up Q7' .'jegm, , clean n unaffeetel for nmsonable cnanLec. 

noreforo, a. real (,-said. chock tn froquency odhLft in flijit. 

This real Um c::al,rticn would nave to oc dose with ca vehicle beacon non- ,

ooeratin. The trans.j'ts once a sinosy sinal that the wideband channel is saturated, and the :LIC: filtef skirts are not shard enou7:h to 

exclude it even. when tuned Gonaider&1;? away 1:rom the boaco frequenay. 

5. Se.nsitivity 1..fference 'Oetp14:A:::), the ViAel.M111 and soannin,; channels nay cause failure to indicate frequency on. sone of tho law level signals, 

since the scamin obsunel has less sensitivity than the wideband channel. 

In spite of the seeming gross error which result from totalling the above individual item, results of tests made with the entire system, 

including the data link, yield excellent correlation with the test inputs. 

SECRET 
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tr: 7eU.1.71,: i-L'6ened for use -

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t error :11,)e to 

cpror In4.ro1l-A17:e the . addition 

;1' 

Thirin the '.3,a7a -yrs,c.essilw 

or soh version, since ti.::. takos -o1ace rr 1abor0:;)ry eonitionf, IL is 

oo-n.lition7,; Can be cohtn,lied, and corrections made for 

errors. 

In slJary, if sar,::i taon to -,:onsidE;r and compensate for the 

various errors tbs5y latween the collection and processing, the 

recultant data. cen raniLf 
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