MOVING TARGET INDICATOR-PROPOSED BY REG-372

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79R00961A000900060005-8
• Release Decision: RIFPUB
• Original Classification: S
• Document Page Count: 7
• Document Creation Date: December 12, 2016
• Document Release Date: June 7, 2001
• Sequence Number: 5
• Publication Date: December 12, 1957
• Content Type: MF

Approv For Release 2002/01/30 CIA-RDP79W0961A000900060005-8
OPer th is faeida A ter atu +6ina the ~r~a3la me
e e y :f, a is r iet 'e source des i MA an maw i i
c
rcu t tdafcb,
cplet. 1.~~
V2 camber 1957
*Army Declass/Release Instructions On File*
Declassification/Release Instructions on File
f w=w F
(Ger aany )
r w 7ftd.' atdr - Prcc nosed by i* 372
r , n hs of his a z.io~ment as deputy tn the di +
s~
Riga Frequency within "
?~s4^d In the Imo. Source does not know fie e
register the ?atent ix x d s
c countries
ou
h
~
. ;
rce
ss a
issciri
?.at to t4-P, stave an his o inittatlvs at the present time to reg& tear the
:.{ a w
t
es
beeuse of possible reprisals against his relaticvv:s
C P O 8 R J TWMIQUR
q : purpose of this proposed circuitry in to provide means of i.asti:"yi$ag
moving targets fordo station ry targets when using radar equipment. 17I
propose viii be suitable for d.ispl.aying the stationary targeta should tbit be desired. In addition, this sc2, will soy
3nwcmmic +..er _ t permit the se _tiou
: only outgoing targets, or both, outgoing at fac ing
-g , as desired.
4i or t f iculties normally included in cozaventional ache e:s a
a? a dewy line element. which is a norms ly quite costly
..r4+4
c
y d
e
eesi,Med ccar ponent, is no longer necessary.
The critical time correlation of the t fitter pulse
repetition frequency and the delay line time eowRtsnt is eliminated.
o. blind speeds at which moving targets cannot be detected
with conventional )M systems because of their phase dependency, arse
sl4' 4nate.R
5
Fi re one shows one method proposed in this new system. 7he radar
transmitter pulse is used to stabilise a reference frequency generator.
During the transmitting pulse the bletaker, is opened to permit operation of
the frequency control circuit. the control iA &210%11 +hek+ +U- ...~....~_~_
6
;~ ~?:`e 4 9pprov?TM1t I ll"162 I fC P gR9QM%AtS0Op006 p5-8
C / o ___(__pages
o
py_ r of 2 copies T 44
8- 1 7
- )
 AppVWed For Release 2002101/30 : CIA-RDD R00961A000900060005-8
is tr smi-tter Y`reguoac x end fS is the local oscillator Frequency.
4 eaare 1 V*
The frequency received.. vi,L.1 include fl, the transmitted frequency, and
+.6 f, or f1 tel fs (more tk one moving tart)- f1 will. be received from
,_j. stationary targets hich reflect an rgy back to the receiver; however,
Movi targets will produce a frequency of f 14-x? f . The exact value of A f a
is a function of the radigal component of the target speed sad the basic tran a-
,tter fre v ncy (tuldmR into account glent, reflecting surface, number of hits
and ,tter ZAa echo signal is than mixed with the local oscillator fre-
ucncy, f2, and the resultant Yl .. i a2f is amplified. The amplified output
of this signal is then fed to a m tfplier stage of which the output is
1 f2t Oaf. The signal is then mixed with a signal equal to 3 f3
tend "the resultant frequency obtained in f t 46f. As many multiplication
stages and mixers stag's can be made as deeire2 (two are shown in Figure one),,
, b output being f 1'2 t 4214 f , vbare `a a equals the number of multiplier
d mixer s taws uuilised.
71.3_a output is than fed to a discriminator and the output of this stage
is fed through opposing diodes, as showc. Depending on which switch, ai or
s2, is closed either target moving tovards, or away from the radar station
r be awn on the oscilloscope. If both switches are cloud at the mame
tie, all moving targets can be r o u.
the event it is desired to show stationary targets, a parallel branch
is connected between the last mixer output passed through a demodia].stor
5 a~ nn.. VW" B is closed,; ee static .'y targets can be observed. In this
branch are inclu one or more multiplier and mixer stages. The exact -number
is determined as a function of the lowest speed considered to be a moving
target and the pulse wideth of to system. Sufficient number of stages are
included so that the multiplication factor obtained places the possible
doppler. frequencies of moving targets outside of the bandwidth of the last
By adding tuned stages just prior to the discriminator stage, one
cexxt select targets that are approaching or receding with a given or specific
speed.*
D Cooament t This scheme is very similar to that used by Raytheon Corp
in the Sparrow III "stem.
-.Ifs- Approved For Release 200 / 1_ 0 IA-RDP79R00961A
6
 Approyed.For Release 2002/01/30 : CIA-RDP79R00961A000900060005-8
M, C `h'id V9 MCIAMW dial DIZ a~ =T 29X".F"LICATICH
I'igt? Two, vs :.oih a Y. o x of this over-all 4T1 scheme. In this
t discriminator output vill be used to control the tuning of the
reference frequency generator. If an integrator unit is inserted in the con-
I loop, the loop can be made to compensate for slow changes in the
t natter ttaquency and/or the local oscillator.
)than variation of this ctantrU.L Figure ee, is to use again
t spitted pulse. end throu appropriate attenuation circuitry lot each
ul (at a suitable level) be snplib led th rou the circuit. Each transmitter
output from the discriminator is used to control the tuning of the ref -
nr nce frequency generator. An appropriate gating schema, similar to the
offer shown in Figure One will be required to permit the control circuit
to be operated only during the time of the transmitter pulses. The circuit
control time constants can also be made such that each individual transmitter
pulse is used to completely tune the reference signal generator.
zis report does not deal with intelligence aspects of this work; Which
source psrrf'oz ed at the research canter in Dresden D1 . )3eveertheless, the
intelligence significance of this proposal as it relates to the guidance
s,-ir,te that ice u or" cA iz the Ianingradskoye shocse Institute in
Moscow should be pointed out briefly. The coordinates cabinet designed by
source a' this institute and which y built there during the period 1951 to
guidance system depicted caly. e
d-19 for use with the Soviet 9-204
dimensions; i.e., two angle and one range dimension. Source had alv s considered
t e to be excessively vulnerable and made the coenent that if one flyir%
laboratory vere to fly past the installation only once it would be posai,ble
to detect the weak spots and effectively outmaneuver the installation on a
second comfit mission.
7he BTl technique described above, would, according to source, lend
itself quite admirably and easily to the incorporation of a fourth dimension
into the coordinates cabinet. With the addition of this fourth dimension,
namely speed, the guidance installation would be iraameasurably less vulnerable
to conventional counter-measures. Indeed, it would be a serious problem than,
to combat such guidance installation.
2. Indicated to the DDR officials at the time he preesenU4 his
technique as an Mn proposal.
S o u r c e n e g a t e d both questions. He stated t h a t in the USSR he did not
have this idea; and even if he should have had this idea he would not knave
given expression to it, for fear that the Soviets might decide to hold him
in the USSR still longer to work out i s Improvement on Page B-200 oinstal,lation.
pages
Copy_ of copies
Approved For Release 2002/01/30: CIA-RDP79R00961'fs00@9@~0600051727
 Approd For Release 200/t/36CI
~ A-RDP00961A000900060005-8
Furthermore, ire stated that in the I)R he presented the outlined idea only
as an I technique and never pointed out its merits in connection with adding
a fourth (speed) dimension to a dance system.
In conclusion. he suggested that while one may well expect the DDR
authorities to mike the MI technique available to the Soviets, he does not
expect the soviets to recognize the significance of this MI technique in
connection with the B-200 guidance system. He admitted, of course,,, that this
to purely con ectural.
C CUEIO~f
Although it is recognized that similar circuits have been developed in
recent years in the ice, there is insufficient information in this office
to compare them with the proposed system described herein. It is, therefore,
r c ded that all interested a nciees be requested to evaluate the
niques outlined above. This office requests that any rights of the
lover be respected. Source has stated that he is willing for the US
3 ?w t to utilize the ideas without remuneration; however, if the ideas
used ec miexeially outside of governmental work, he desires to retain
all. rights.
his office desires to be informed of the concensus of opinion of these
circuits; requests for ddditioneal; information are solicited.
The information contained in this memorandum will be included in EG-1877
which is scheduled to be published early in 1958.
C.W. Rifler
Colonel, Ord C
S-E-C-R-E-T Page of,. 2 pages
Approved For Release 200:0Q 0: Cl ~79R00969?AO COpies 7 2 7
 Approved For Release 2002/01/30 : CIA=RDP7
T1 3 i'r nc nit.ter frt~':~rcCV
focal c5ci1ater 'rc. ency
L ~1 8eferenze frequency
frequency
P SCRIMI
,4-r
OSclc.~o-
ScoP
Approved For Release 2002/01/30 : CIA-RDP79R00961A000900060005-8
0060005 -$ 4
 f -f ~~r 16af ~ ~ - ~s
Multiplier unit
Multiplier
A~Sc ;11f1N F PEmoD
A TOR,
OSGJ1LCD
.tcop
Approved For Release 2002/01/30 : CIA-RDP79R00961A000900060005-8
 Approved For Release 2002101136-:
f zt 4 a f
T
ill ?: f-fzt- 42 -4f 4-4f
f EU:lrti~ = y E
1 i
Transmitter frequency
Leeal oscillator frequency
Reference frequency
Doppler frequency difference
lumber of multiplier and mixer stages
Multiplier unit - b times
Multiplier unit - 3 times
'Attenuator
os cr L c.o -
Sc,opE
Approved For Release 2002/01/30 : CIA-RDP79R00961A000900060005-8