PURPOSE OF VISIT (Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A000900050122-3
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: June 17, 2002
• Sequence Number: 122
• Publication Date: August 3, 1961
• Content Type: MF

Approved For Release 2002/07/10 : CIA-RDP78604747A000900050122-3
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PBECIUMM R: Executive Director, NPIC
THROUGH: Acting Chief, T1SD
FROM: Chief, TISD/TIB
SUBJECT: Purpose of Visit
3 August 1961
STATINTL
1. The stereo comparator is a complex piece of equipment which
has several unique features that we are not entirely familiar with. Fast
experience has proven that a greater understanding of the cepability of a
piece of equipment can be gained by working directly with the manufacturer
at his plant. Only in such a manner can one receive full appreciation of
the operation, calibration, and maintenance considerations associated with
the equipment.
STAT
STATINTL
2. The intent is that perform acceptance tests on the
instrument as project monitor. The testa can be performed during the final
stages of assembly, after the unelts are merged with the comparator.
The philosophy behind the acceptance test is as follows: STATINTL
To observe the necessary operational procedures and evaluate their
gee effect on successful production operation of the instrument with special
emphasis on future photographic system. Also if a particular control or
method of operation proves impractical or somr_er.1 control is not pro-
vided, the time to correct it is on the first i.e. before all STAT
three are delivered. All other pertinen aspects of the acceptance STAT
test can be covered by as outlined below. STATINTL
STATINTL
3 I lintent is to follow, step by step, the assembly of the
instrument quire as complete knowledge of the whole instrument as
possible within the time allotted. This is to include mechanical assembly,
optical alignment and testing, trouble shooting, and error detection of the
electronic circuitry. Of importance is the merging of the 'Moire
Fringe system with the basic comparator. The basic accuracy of the entire
system depends on the mounting of the fringe gratings, therefore, the pro-
cedure must be diligently studied for maintenance and calibration.
STATINTL
Declass Review by NIMA/DOD
Approved For Release 2002/07/10 : CIA-RDP78604747A000900050122-3
STATI NTL
Approved For Release 2002/07/10 : CIA-RDP78604747A000900050122-3
4. While has a maint nance force in D.C. they are not trained
STAT to handle all aspects of the particularly the electronic parts.
The maintenance that they wi provide will be of an optical-mechanical
nature. Notwithstanding adequate knowledge of the construction, elec-
tronic circuitry and optical alignment will permit many on-the-spot
repairs or enable detecting failures before total breakdown, and thus
minimize down-time.
5. To maintain and check the accuracy of a comparator, a calibration
procedure must be accomplished. Calibration is a lengthy, complicated
procedure and must be performed periodically. should be thoroughly
familiar with the calibration technique. STATINTL
NPIC/TISD/TIB:
STATI NTL
Distribution:
Original & J. Executive Director IC
1 - Acting Chief, TISD
1 - Chief, TISD/TIB
Approved For Release 2002/07/10 : CIA-RDP78604747A000900050122-3
STATI NTL