DUAL GAMMA PROCESSING MSN 1109 INDEX RECORD

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B03826A000100090078-0
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: September 17, 2008
• Sequence Number: 78
• Publication Date: May 13, 1970
• Content Type: CABLE

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Approved For Release 2008/09/17: CIA-RDP78BO3826A000100090078-0
T 0 P S E C R E T 131802Z MAY 70 CITEI X515
13 Mar 70 18
-fil- / a 2
SUBJ: DUAL GAMMA PROCESSING MSN 1109 INDEX RECORD
1. HAS DETERMINED 25 PCT MSN 1108 AND 3 PCT
MSN 1109 INDEX RECORDS EXPOSED AT SOLAR ELEVATION BELOW 15
DEG. LARGE PRECENTAGE OF LOW SOLAR ELEVATION ACQUISITION
MSN 1108 SUGGESTS REASON FOR DENSITY EXTREMES ENCOUNTERED
THAT MSN.
2. NO EVIDENCE EXISTS FROM MSN 1109 INDEX RECORD SUG-
GESTING DUAL GAMMA PROCESS WILL OVERCOME DENSITY EXTREMES
SIMILAR TO THOSE ENCOUNTERED MSN 1108; HOWEVER, EVALUATION
OF SIMILAR COVERAGE FROM 1108 AND 1109 INDEX RECORDS INDICATES
DUAL GAMMA PROCESS HELPED COMPRESS HIGHLIGHT AREAS ON MSN
1109. HIGHLIGHT COMPRESSION HELPFUL WHEN DESERT AND HIGH
REFLECTANCE TERRAIN IS IMAGED.
DUAL GAMMA PROCESSED NEGATIVES PROVIDES MORE IMAGERY IN A
USEABLE DENSITY RANGE.
T 0 P S E C R E T
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Approved For Release 2008/09/17: CIA-RDP78BO3826A000100090078-0