PROPOSED EVALUATION TRIP FOR THE(Sanitized) CHANGE DETECTOR

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A002500020036-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 7
• Document Creation Date: December 28, 2016
• Document Release Date: July 15, 2002
• Sequence Number: 36
• Publication Date: June 9, 1964
• Content Type: MF

 25X1A
25X1A
25X1A
A pr v d For Release 2002/07/23 : CIA-RDP78BO4747AO0250002OQ36-4
LM D VIE-
A 015 SEAR 1.
Approved For Release 2002/07/23 : CIA-RDP78BO4747AO02500020036-4
~i2v~a c ~"
 25X1A
Approved For Release 2002/07/23": 'CIA-RDP78BO4747AO0250002-
CHANGE DETECTOR BRIEFING
FOR
JOINT PROCUREMENT
25X1A
THIS IS THE CHANGE DETECTOR BEING MADE
ILLEGIB
25
IT IS DESIGNED TO COMPARE IMAGERY OF ANY GEOGRAPHIC AREA TAKEN
AT DIFFERENT TIMES, AMID AFTER AUTOMATIC REGISTRATION OF THE TWO IMAGES, TO
DISPLAY THE CHANGES THAT HAVE TAKEN PLACE.
THE EQUIPMENT IS DESIGNED TO ACCOMMODATE 70MM FILMS HAVING RESOLUTIONS
UP TO 50 LINES PER MM. IT WILL BE POSSIBLE TO DETECT CHANGES ON FILMS HAVING
RESOLUTIONS GREATER THAN 50 LINES/MM. BUT ANALYSIS OF THE CHANGES WILL NOT W.
POSSIBLE ON THE PRESENT MACHINE. IT HAS BEEN ESTIMATED THAT TO INCREASE THE
REOLUTION TO 150 LINES PER MILLIMETER WOULD REQUIRE A RESEARCH AND DEVELOPMENT
PROGRAM COVERING ABOUT 3 YEARS AND WOULD COST ABOUT
I
Photo 2 THE CHANGE DETECTOR CONSOLE IS ABOUT 9 FEET LONG, A LITTLE OVER 6 FEET
HIGH AND ABOUT 4 FEET DEEP.
IN OPERATION THE INTERPRETER SEATS HIMSELF AT THE RIGHT OF THE CONSOLE
AND CONTROLS THAT PORTION OF THE FILM BEING EXAMINED BY THE JOY STICK. HE IS
ABLE TO ZOOM UP ON ANY SELECTED AREA FOR DETAILED EXAMINATION BY MEANS OF THE
TWO WAY SWITCH JUST TO THE LEFT OF THE JOYSTICK. CHANGES ARE INDICATED EITHER
BY A MISS-MATCH OF THE TWO SIGNALS ON THE SAME SCREEN OR BY THE FLICKER COM-
PARISON TECHNIQUE. THESE CONTROLS ARE LOCATED JUST TO THE LEFT OF THE ZOOM
SWITCH.
X1A
Photo 3
Photo 4 THIS IS A SCHEMATIC OF THE OPTICAL-MECHANICAL SYSTEM OF THE CHANGE DETECTOR.
THE CRT AT THE BOTTOM IS A FLYING SPOT SCANNER WHICH ILLUMINATES EACH OF THE
TWO FILMS. THE TWO FILM GATES WHICH ARE EACH MOVEABLE IN X, Y, AND Z PROVIDE
Approved For Release 2002/07/23 : CIA-RDP78BO4747AO02500020036-4
 Approved For Release 2002/07%2~%-6(k-P,6018404747AO02500020036-4
HOLDERS FOR 1 THE REFERENCE FILM WHICH WE SHALL PLACE ON THE RIGHT AND
2 - THE COMPARISON FILM WITH THE CHANGES WE WILL THEN PLACE ON THE LEFT, THE
SCALE OF THE TWO FILMS WILL THEN BE MATCHED BY MOVING ONE OR BOTH OF THE FILM
HOLDERS (OR MAGAZINES) VERTICALLY ALONG ITS SUPPORTING RODS THS FILMS WILL BE
ORIENTED BY ROTATING THE DOVE MIRROR. THE TWO FILMS WILL THEN BE REGISTERED
BY SERVOS PHYSICALLY MOVING THE TWO FILM GATES IN AN X Y DIRECTION UNTIL A
ROOHMATCH OR CANCELLATION OF SIGNAL HAS BEEN ACHIEVED, AT THIS POINT THE
ROTATING NUTATION WEDGES GO INTO ACTION AND DO AN AUTOMATIC CORRELATION OF THE
TWO SCEENS. THE DIFFERENCE BETWEEN THE TWO SCEENS IS 'T'HEN DISPLAYED ON THE
VIEWING SCREEN.
Photo 5 (THIS IS A BREADBOARD OF THE AUTOMATIC CORRELATION OPTICS AND MECHANISM)
TWO NOVEL FEATURES OF THIS. MACHINE WILL BE SHADOW REJECTION AND RASTER SUPPRES-
SION OR, SPOT WOBBLE, THAT IS, THE SPOT WILL VIBRATE AT HIGH FREQUENCY BETWEEN
THE LIMITS OF THE RASTER LINES IN SUCH A MANNER THAT WHEN VIEWED FROM A SHOT
DISTANCE'THE RASTER LINES APPEAR TO BLEND IN TO EACH OTHER.
Photo 6 FABRICATION OF THE CONSOLE IS COMPLETED, FABRICATION AND INSTALLATION OF
THE COMPONENTS IN THE CONSOLE IS UNDERWAY.. BECAUSE OF THE 9 FOOT LENGTH OF
THE CONSOLE THE BASIC FRAME HAS BEEN CUT AT THE JUNCTION OF THE OPTICAL-
MECHANICAL AND READ-OUT ASSEMBLIES, THEY WILL BE RE-UNITED AFTER DELIVERY OF
THE EQUIPMENT TO ITS DESTINATION.
THERE STILL REMAINS ABOUT TWO MAN MONTHS WORK ON THE DESIGN OF THE SHADOW
REJECTION AND RASTER SUPPRESSION CIRCUITS.
DELIVERY OF THE CHANGE DETECTOR TO THE GOVERNMENT IS SCHEDULED FOR MAY 1964
THE PROGRAM IS ON SCHEDULE AND IT APPEARS THAT THIS DATE WILL BE NET. ABOUT
30 DAYS BEFORE DELIVERY THREE EACH GOVERNMENT PERSONNEL WILL BE GIVEN PRELIMIN-
2 5X1A ARY TRAINING DURING THEIR CHECK OUT OF THE EQUIPMENT. FURTHER
TRAINING WILL BE GIVEN TO GOVERNMENT PERSONNEL BY THE FACTORY REPRESENTATIVE
IN MAY ~0990~1 1 g :GU1?r47`ia4%7~'I7U7 I'RENTLY CALLS
 Approved For Release 2002/07/23 : CIA-RDP78BO4747AO02500020036-4
25X1A
25X1A
FOR TWO DiEPRESENTATIVES TO SPEND 15 DAYS EACH AT THE POINT OF
THE COST OF THIS DEVELOPMENT IS GIMRADA IS COOPERATING IN
THE ACTUAL ADVANTAGES AND LIMITATIONS OF THIS MACHINE IN THE PERFORMANCE
OF THE PHOTO INTERPRETATION FUNCTIONS OF THIS AGENCY WILL NOT BE FULLY
KNOWN UNTIL AFTER THE EQUIPMENT IS ON HAND AND SOME EXPERIENCE HAS BEEN
GAINED IN ITS USE.
HOWEVER OTHER ITERESTED GOVERNMENT AGENCIES WILL BE GIVEN AN OPPORTUNITY
TO BECOME FAMILIAR WITH THE INSTRUMENT AND TO ASSAY ITS APPLICABILITY TO
THEIR OPERATIONS DURING THE EVALUATION OF THE MODEL.
Approved For Release 2002/47123 -: CIA-RDP178B04747A002500020036-4
 25X1 D Approved For Release 2002/07/23 : CIA-RDP78BO4747AO02500020036-4
Next 8 Page(s) In Document Exempt
Approved For Release 2002/07/23 : CIA-RDP78BO4747AO02500020036-4
 25X1A
Approved For Release 2002/07/
25X1A