JULY PROGRESS REPORT, (Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A000200010053-2
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: July 1, 2004
• Sequence Number: 53
• Publication Date: August 11, 1967
• Content Type: LETTER

Approver Release 2004/07/29: CIA-RDP78BW70A000200010053-2
17 1967
PLEASE ACKNOWLEDGE RECEIPT FOR THE MATERIAL LISTED BELOW:
3, 4, 5 of % cys Page 1 of 2 Pages w/encls
July Progress Report 1967 dtd 11 Aug 1967
DATE
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A5 -5 Ncl(r-
Declass Review by NGA.
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 Approvefor Release B , Ir^RT7
1101 c `cep %D/95 j 545
Copy .1 of - Copies
11 August 1967
25X1
25X1
Subject: July Progress Report,
in the study of Distortion Feedback Servo Loop Stability, approximately 46 per-
cent of the work is now complete, while the Registration Correction Accuracy
Program is approximately 82 percent complete. The Image Dissector Scan
Distortion Program is approximately 75 percent complete. The 95 percent
completion of this item reported in the June Progress Report was misleading,
as this was intended to apply only to the circuit design and construction phase
and not to the overall program which includes testing. The actual percent com-
pletion figure in June should have been 42 percent.
1. Technical Progress:
1. 1 A detailed test plan (see Enclosure I) was developed, and item 1 of that
plan has been completed. The testing has not progressed as rapidly as
anticipated due to conflicting schedules of the personnel involved, but no
delay in completion is expected.
1 . 2 A detailed test plan (see Enclosure II) has been prepared for this phase
also.
25X1
Special photographic materials have been prepared which aim to eliminate
systematic errors believed to originate in the plate transport. These
materials contain conjugate stereo imagery at the same general locations
on the plate relative to the transport as is the case in identical photographs.
The correlator was bore sighted with the floating mark system by electronic/
optical methods which will be discussed in detail in the Final Technical
Report.
GROUP 1 THIS DI THE NAT OVAL DEF SEOo M HEIONIA D
STATES WITHIN THE M EANING Of THE 93 AN '
Excluded from automatic downgrading ESPION
AGE LAWS RS '193 ACID
and declassification . TITLE 1E U.S.C.. SECTO
794. ITS TRANSMISSION OT THE RcVcLA51c
Of ITS CONTENTS IN ANY MAIiEI-~' r.p.I t
AUTHORIZED PERSON IS PR~.7I?:B'TED Y
Approved For Release 200 f 04770A000200010053-2
 Approvivor ReleaS2ee erll l`'~C1 -RDP7> 770A
Copy ?4 of 4- Copies
Sincerely,
25X1
25X1
25X1
25X1
5X1
1. 3 The circuitry necessary for automatically closing the parallax servo
loop in the video- correlation breadboard forl has been
completed, Initial testing of this loop indicates a pull-in rage of
approximately 10 percent.
The determination of servo loop constants for closing the scale and
skew correcting servo loops is underway.
2. Next Month:
2. 1 Testing will continue as on the test plan, and lock-on limits will be
determined.
2. 2 Parallax measurements will be made of same object points under
different scale conditions and different zoom conditions. This will be
followed by reduction and analysis of the data.
2. 3 The scale and skew correcting servo loops will be closed automatically
and tests on stability and pull-in ranges will be made. As discussed in
the June Report these tests will be coincident with ests.
3. Pending, unresolved technical problems; none.
4. Pending, unresolved contractual problems; none.
5. No agreements of record
6. No proposed changes.
7. No unanswered or unresolved matters.
1. Proposed Test Plan
2. Experimental Program Diagram
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Project Manager
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PROPOSED TEST PLAN FOR PROJECT
1. Determine optimum combination of focus and intensity for gross scales
of 3, 4 and 5. (This determines raster and spot sizes).
2. Determine lock-on limits for translation scale and skew independently.
3. Determine lock-on limits for combinations of translation, scale and
skew.
4. Determine effects of gross scale changes on lock-on limits,
5. Vary feedback values and determine effect on speed of lock-on and lock-
on limits.
6. Determine effects of P/V count as a feedback parameter.
All of these tests will be repeated for different types and densities of imagery,
and rotations will be made in image insertion to note effects on correlation of
the direction of picture highlights.
Programming is underway to allow stepping of the right (undistorted) raster
between successive scan sets to simulate correlation action during dynamic
scanning process. The tests outlined above will be repeated for this condition.
These tests should lead to a determination of optimum feedback values for both
the static and dynamic scanning cases and the lock-on ranges as a percentage
of raster size associated with each.
25X1
14 July 0
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5 I Experimental Results
Determine Raster
Center vs. left
Measuring Mark
(min/max zoom)
_ ,
62 Bar Pattern
Plate
(D Identical
Open Loop
Precision Tests
(min/max zoom)
Camera 5a
- Focal Length - 6Cinches
Altitudes - 5, 10 & 15 thousand feet
Attitude - Vertical
B/HRatio -0.6
EXPERIMENTAL PROGRAM DIAGRAM
Determine Raster
Size at Film
(min/max zoom)
G4 Stereo Photo
Plates
Photo Niaterials
Preparation
Calibrate Meas.
Mark Motion at
Film
;min/max zoom)
Motion
Calibration
Closed Loop
Clearance Error
Measurements
(minlmax zoom
"Zero
Readings"
Closed Loop
Accuracy Tests
(min/max zoom)
Closed Loop
Precision Tests
(min/max zoom)
Reference
Data
((Automatic vs. Manual
Parallax Clearance
Errors)
Comparative Data
"Zero" Parallax
L Readings
NOTE: Stereo Plate Characteristics:
0
Approved For Release 2004/07/29 : CIA-RDP78B04770A000200010053-2