PROCESSOR PROGRESS REPORT FROM 1 FEBRUARY TO 1 MARCH 1963

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP67B00657R000200170001-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 70
• Document Creation Date: December 22, 2016
• Document Release Date: December 22, 2009
• Sequence Number: 1
• Publication Date: March 8, 1963
• Content Type: REPORT

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SF' C A" AND-A-46
ITEF T.,ABORATORIES
10 Maguire Road
Lexington 73, Massachusetts
8' March 1963
SRC63 -9015-103
Copy No. 2_
STAT
Processor Progress Report from 1 February to 1 March 1963
STAT
Flight Tests
Correlation of flight film S-37 continued into February with significant
ir.,provement over previous flights. The best output photos were obtained
using a duplicate of the primary record, a technique which apparently pro-
vided a certain amount of signal enhancement. Figures 3, 4 and 5 are
representative of the better correlated film. A set of corner reflectors
of various radar cross sections and separations were placed in a parking
lot of a stadium west of the Naval Academy at Annapolis (Fig. 3). Re-
flectors separated by 30 feet in azimuth were clearly resolved, and in
range the resolution was also about 30 feet, but because of saturation
or " overshoot" of the signal in the range direction the separation was
not as pronounced. Two reflectors were separated by 25 feet in azi-
muth, but they appeared to have been lost in the strong return from the
rest of the targets.
Figure 6 is a 7X enlargement of the primary record showing the stadium
and corner reflector area. If the picture is viewed such that the figure
number is on the left, the signal history of the reflectors can be seen in
the center of the picture, with the zero beats occurring about 1 1/2 inches
from the left hand edge of the picture area, The stadium is the U-shaped
area above and to the right of the reflectors. It should be noted that the
:azimuth data is stretched-out approximately 8 3/4 times that in range.
r. r /%i A i LJ A AIf-%I I N1r
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S,'EC IAL. HANDL; 'JG
Correlation of S-37, and subsequent films, was done with the 10 inch wedge
interference filter for range compensation. Because of the altitutde of flight
and range interval involved, there is a mismatch between the slope of the
wedge and the range interval. This results in defocusing and degradation
of the image toward the edges of the film. There is considerable improve-
ment over monochromatic illumination, however.
Flight S-39 was flown at 40,000 feet, but because of corona near the CRT
the entire film was covered with saw-toothed banding which occurred at a
frequency of about 4 cps.
Flight film 5-40 was received on 23 February 1963 and correlated. The
second run was particularly good (Fig. 7), showing much of the more
familiar areas of Washington, D.C. The runway approach lights or sup-
porting structure at National Airport, projecting into the Potomac River
are clearly seen, as are airplanes, vehicles or other structures on and
around the runways. The detail in this film seemed even better than S-370
Fnfortunately, the corner reflectors were not in the mapped area, so no
direct comparison between S-40 and S-37 is possible.
Tests are now being conducted in an attempt to improve the dynamic range
and the signal-to-noise ratio. Studies are being made concerning the effects
of duplicating the primary record, the effects of the gamma or gamma pro-
duct o' the films, and the diffracting efficiency of various types of film.
Camera: The camera unit was installed with a dial indicator, to
facilitate thru focus runs. It has proved most helpful in tracing some of
the stray light problems. The camera together with monobath processing
have enabled us to proceed very quickly with many preliminary tasks.
Television: The fabrication of the mount for the television camera
is 90% complete. It will be mounted during the second week of March.
coPr" 1AI HA Jf1 ING
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S. ,EC IAL HANDL: JG
Drive Study: Several transport runs were made to determine the
stability and repeatability of the drive system. It was found that the change
of insertion and tilt necessary was beyond the capability of the detectors
and wear on the eccentric cam for the fine adjustment made accurate
settings impractical. New parts were fabricated.
Several new systems were studied to give continuous control over a speed
range of 1000:1.
Platen: The mechanical parts for the new platens are complete.
The glass platens will be ready for mounting early in March.
Performance Studies ,
Range Resolution: New long line resolution targets of 24, 32, 40,
66, BR, 110 lines per millimeter were made up. These were used in con-
junction with the camera and best resolution obtained was 88 lines per
millimeter at the input. Since in the application only 40 lines per milli-
meter will be used most of the work done was to increase the contrast
at this level. Figure 1 is a 40X enlargement of the results. The first
run on the roller platen was overexposed and will be rerun during the
early part of March. Table I outlines the, tests made.
Azimuth Resolution: The camera was also used to bbt9.in the
best correlation of the ruled target. A mercury arc source was used to
limit the bandwidth. Pest preliminary results gave a line width of .002.
Figure 2 is a 40X enlargement of this image,
Sincerely,
STAT
CWM/bh
cot f" I A l 1-4 A r% I I M(;
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S. EC IAL HANDLING
Range Resolution
Resolution
Target
Output
Mode
Purpose
at output
Comments
Film
(1/mm)
T20
Polaroid
Camera
Focus
20
approaching limit of film
T20C1-6
Panatomic X
Camera
Focus
33
35. slit
T20C7 -12
Panatomic X
Camera
Focus
33
3511 slit, zero stop removed
T2r1Cfl-24
Panatomic X
Camera
Focus
44
under exposed
35? slit. 2 best focus.
T20C25-30
Panatomic X
Camera
Exposure
1/5 sec best 3511 slit
T20C31-42
Panatomic X
Camera
Focus
44
3511 slit
T21C1-6
Panatomic X
Camera
Focus
20
Best focus difficult to identify
T21C7-16
50243
Normal
Exposure
monobath development
T21C17-36
S0243
Normal
Focus
20
Over-exposed - developed
in D76.
Azimuth Resolution
Line
Width
T215C8-13
Panatomic X
Camera
Exposure
---
1511 slit.
T215C14-19 Panatomic X
Camera
Focus
.0024
1511 Slit.
T215C20-26 Panatomic X
Camera
Exposure
---
Hg arc source 6A slit.
T215C27-38 Panatomic X
Camera
Focus
00020
Hg arc source 611 slit.
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