EVALUATION OF(Sanitized), PROPOSAL FOR MTI INDICATOR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79R00961A000900060007-6
• Release Decision: RIFPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 12, 2016
• Document Release Date: June 7, 2001
• Sequence Number: 7
• Publication Date: March 20, 1958
• Content Type: MF

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Approved For Release 2002/01/30 : CIA-RDP79R00961A000900060007-6
-17 ft.
DEPARTMENT OF THE ARMY
OFFICE OF THE ASSISTANT CHIEF OF STAFF, INTELLIGENCE
WASHINGTON 25, D. C.
20 March 1958
ACSI-IT
*Army Declass/Release Instructions On File*
Declassification/Release Instructions on File
MEMORANDUM FOR: CHAIRMAN, GUIDED MISSILE INTELLIGENCE COMMITTEE
SUBJECT: Evaluation of REG-372, Proposal for MTI Indicator
1. Reference is made to REG Report EG-1877, subject: "Proposal
for a Moving Target Indicator"., and to memorandum from GND_C, dated 16
January 1958, subject: "Request for Advice from GMIC R&D consultant
to Chief, REG. We concur in the following comments by Dr. Saundars
and Mr. Pervy W. Griffin of DOFL in evaluation of the report, EG-1877?
a. This is the first step in a design process that has gone
a long way in America.
2. what is required is not just frequency coherence, but phase
coherence.
3. The claim that blind speeds are eliminated is erroneous. This
is a function of the information sampling rate. In our view, the Soviets
are probably well aware of the requirement for an MTI system for the
B-200 system and are probably devoting intensive effort to develop an
MTI so as to provide the B-200 with a low altitude capability. However,
we do not believe that when and if the Soviets become aware of Kummer's
patented MTI, such a proposal will have any appreciable impact on the
Soviet MTI development program.
4. The proposals of REG-372 resemble the way a modern U.S. pulse
doppler radar works, provided the block designated as the "reference
frequency generator" is maintained phase coherent or synchronized with
the radar frequency.
It is doubltful that it applies to the B-200. The fundamental
doppler frequency for a target flying at 1000 feet per second being
detected by an S-band radar is:
Approved For Release 2002/01/30 : CIA-RDP79R00961A000900060007-6
SECRET
 SECRET
Appro pd For Release 2002/01/30 : CIA-RDP79R00961A000900060007-6
D-100V
X
D is given in cycles per second
where V is given in knots
is transmitted wavelength in centimeters
1000 1/sec _ 1000 x 3600 - 592 knots
708-0
D _ (100) (592) _ 5920 cycles/sec
This frequency would be easily detected without multiplication if
the radar PRF.were high enough. It does not appear that the B-200 PRF is
high enough for the doppler frequency to be detected.
5. On the basis of this evaluation, it is not too likely that the
proposal of REG-372 would have been given any more consideration by the
Soviets than any other MTI proposal.
Unable to determine regrading data
WILLIAM R. PARR
Lt Colonel, GS
Army Member, GMIC
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