(Sanitized) LOW GAMMA EXPERIMENT

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04767A000100140001-0
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 5
• Document Creation Date: December 28, 2016
• Document Release Date: June 28, 2002
• Sequence Number: 1
• Publication Date: November 7, 1966
• Content Type: MEMO

25X1 NRO
NRO REVIEW
COMPLETED
TOP SECRET
Approved F 4r Release 2002/08/16 : Wlit F 7M64UW001001400
Copy No. J/- f
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7 November 1966
TO: Distribution
FROM:
SUBJECT
neering photography. The conference was attended
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LOW GAMMA EXPERIMENT
A conference was held n 2 November to discuss the present 25X1
status and action required to assess low gamma processing of on-orbit engi-
etric ?a, a o the original negatives and duplicate positives. A copy of this
report is included as Attachment 1.
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presented a review of the low gamma processing studies and I?ryl
the prop ems that have been encountered. There is no present capability to
conduct interrupted processing with the low gamma chemistry. There is some
question as to the range and level of maximum resolution with low gamma
processing. Since no data is available requested to joint- 25X1
ly perform a sensitometric-resolution test. The target Types and contrast
levels were agreed upon during the meeting. The final data is expected to
be, available within a ,month.
discussed the problems of suitable equipment for low gamma processing. 25X1
They feel that a viscous process can be developed but have not been instructed
to proceed with this study. The ~macY.hine is not considered to have 25X1
adequate reliability to process a full mission. It was proposed that a study
be made to ascertain what types of processing equipment are available that are
compatible with the low gamma solutions.
It was agreed that the duplication of the engineering photography for P.I. and
contractor evaluation should be done using the same series of contrasts as
listed in Attachment 1. The positive and negative characteristic curves are
to cross in the 0.9 to 1.0 density range. was requested to number the
frames prior to duplicating.
into two groups o six spools. The two types of O.N. processing and the
three types of D.P. processing comprises the six spools from one camera. The
P.I.'s will be asked to place samples of each spool in order of preference and
to rank each sample to a five step standard. The selected samples will be
reviewed at the next PET meeting prior to the P.I. evaluation.
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The detailed test lan for JLe P. I. evaluation of the experiment is to be
published] e week. In general, the film will be divided, 25X1
Declass Review by NIMA / DoD
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distributed a summary of the printing and processing sensitom-
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or Release 2002/08/16 : CIA
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The photography acquired during this mission is far superior to the 0 25X1
photography for analysis of low gamma processing. Additional photog-
rap should be obtained of major cultural areas and military installations.
The ow gamma test has to be re-run due to an equipment malfunction.
This data will be available in approximately eight weeks.
The acquisition of engineering photography at the end of a normal "A" mission
presents significant operational problems. stated that they were capa- 25X1
ble of measuring film to a l% tolerance. was felt that the tolerance is
more than adequate to precisely locate engineering photography near the end
of an ."A" mission. Then appears to be no reason to restrict the removal of
engineering photography to the tail end of the "A" spools.
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