SO-180 EXPERIMENT, MISSION 1104-2

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04549A000600050035-3
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: July 21, 2009
• Sequence Number: 35
• Publication Date: August 29, 1968
• Content Type: CABLE

Approved For Release 2009/07/21 : CIA-RDP78BO4549A000600050035-3
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SUBJEC i S
1. THE PREDOMINANCE OF CORONA-INDUCED FOG ON THE SUBJECT Lf?~.`.-t.:;~{
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BEING THE COMPONENT RESPONSIBLE FOR ISSUING EVALUATIONS, THER
DEEMS IT APPROPRIATE TO EXPOUND ON THE POSSIBLE CONSEQUENCES
INTERPRETATING THE SIGNIFICANCE OF THE COLOR RENDITION.
2. FOLLOWING ARE SEVERAL POINTS WORTH OF CONSIDERATION:
A. THE CORONA STATIC-INDUCED FOG CAUSES A GENERAL RED C
OF VARYING SATURATION IN THE AFFECTED AREAS. THE CORONA DIS-
CHARGE IS EITHER LOW INTENSITY BLUE LIGHT OR AN ENERGY ONLY A
FECTING THE CYAN LAYER OF THE EMULSION, AND THEREFORE IS IMAG
AS RED. THAT RED IS NOT ASSOCIATED WITH INFRARED ENERGY.
THE CORONA-INDUCED FOG IS ADDITIVE TO THE IMAGE. T
B
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RED IMAGE SATURATION MAY BE EXAGGERATED AND OTHER COLORS CON1i'M`i1'RF
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C. IN ADDITION TO THE CORONA FOG ASSOCIATED PROBLEMS,
ARE COLOR RENDITION ANOMALIES CHARACTERISTIC OF THE CAMERA
SYSTEM. BECAUSE THIS IS A PANORAMIC SYSTEM, THE RELATIONSHI
OF THE PRINCIPAL RAY (LOOK ANGLE) TO THE SOLAR POSITION VARI
ACROSS THE FORMAT. EXPOSURE AND COLOR BALANCE THEREFORE, AL
VARY IN ASSOCIATION WITH SCAN ANGLE. AN ADDITIONAL EXPOSURE
COLOR BALANCE VARIATION CAN BE EXPECTED FROM FRAME TO FRAME
THE SOLAR ELEVATION CHANGES WITH RESPECT TO VEHICLE POSITIO
D. FINALLY, THERE ARE CERTAIN INHERENT CHARACTERISTIC
SO-180 FILM THAT NEED TO BE CONSIDERED. FOR INSTANCE, HEAL
VIGOROUS VEGETATION WILL BE IMAGED DIFFERENTLY DEPENDING ON
COLOR AND ITS INFRARED REFLECTING CHARACTERISTICS. A BALSA
POPLAR, FOR INSTANCE REFLECTS APPROXIMATELY 72 PERCENT OF THE
900 MILLIMICRON WAVE LENGTH ENERGY INCIDENT UPON IT, WHILE A
YELLOW BIRCH RE T OF THE SAME WAVE
I ENGTH ENERGY. =q nN1 Y Agniff 45 PERCEN
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3. THE FOREGOING NOTES SHOULD NOT BE CONSTRUED
DEMNATION OF THE PRODUCT. THE POINTS ARE MADE ONLY TO INDICATE
THE CARE WITH WHICH THIS PRODUCT SHOULD BE EXPLOITED.
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Approved For Release 2009/07/21 : CIA-RDP78BO4549A000600050035-3