TRIP REPORT(SANITIZED) 25 FEBRUARY 1970

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A001300010016-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 8
• Document Creation Date: December 28, 2016
• Document Release Date: August 29, 2012
• Sequence Number: 16
• Publication Date: March 4, 1970
• Content Type: LETTER

Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
DK-521
4 March 1970
STAT
report covering the meeting with
Attention: Paul S.
Dear Paul:
Per your request we are enclosing two (2) copies of a trip
25 February, on the Scan and Search Photointerpreter Station. One
copy for your records and, the other for Ray S.
STAT
STAT
Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
.Subject:
Trip Report]
2-5910-10-142
3 March 1970
STAT
STAT
STAT
Purpose:
A meeting was held
on 25 February STAT
to discuss the human factors aspects of the Scan and Search
Photointerpreter Station. The meeting consisted of discussions
concerning potential equipment design problems and a review of
a mock-up.
STAT
Specific Items Discussed Were:
The subject rear projection viewer has the capability of rear pro-
jecting on a 30 x 30 screen from either of two rolls of 6.6 inch-wide
film. To know which frame on which roll is being displayed is im-
portant information for the operator. Still more important is to
,know film coordinates in a particular frame where area of interest
lies. This information is required both for reporting new targets and
to permit easy relocation of an area previously identified as being
of interest.
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Nixie Tube Readouts are provided for Y position information and
scales along the vertical edges of the viewing screen are provided
for X information. A standarA zed procedure must be developed to
be used in locating areas of interest within a frame. It is suggested
that this procedure be developed by IEG.
2) Image Rotation
Either roll or film may be optically rotated 1900 from its original
orientation. Knowledge of the degree of rotation of'the film being
viewed is useful information for the operator.
A film rotation indicator will be provided which will indicate which
roll of film is being projected and the degree of ratation at any
given instant. It was agreed that this display would adequately
provide the operator with the necessary information.
3) Film Transport
'Film transport for large screen scanning and for film positioning
on the light table is accomplished by joystick control. Location of
the joystick for performing scanning operations is adequate. How-
ever, operation of the joystick to position film for microscope
viewing will be difficult when the operator is seated at the light
table. However, there is no location at which the joystick could be
placed which would complement film positioning for both screen and
light table.
An area being viewed on the screen can automatically be placed under
the microscope and vice versa. This can be accomplished at either
magnification. This is an excellent feature.
4) Film Handling and Loading Operations
In the present configuration, one roll of film is loaded from the
front and one from the back of the viewer. Film,must be attached to-a
11leader" strip which then threads it for viewing. ? The motorized film
Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
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transport system is controlled by a set of four pushbuttons operated
from the side of the viewer. The situation warrants the following
considerations:
? Loading of film from both the front and rear is time consuming
and increases "set-up" or readying operations considerably over
a configuration which would allow both rolls to be loaded from
the front. To promote operator convenience and hence efficiency,
a method of loading both rolls of film from the front of the
viewer should be considered, Elimination of loading from the
.:...rear of the viewer would also save considerable floorspace by
allowing the viewer to be placed flush with walls. With the
present design, space must be left behind the viewer for the
operator to work. Page 4-24 of the design guide gives a re-
commended space of 40 inches for this type of operation.
? The present automatic film threading technique requires that the
film be "taped" to a leader strip which then threads the film
into the viewer. The "taping" of the film to the leader strip
.with masking tape is no improvement over past operations. Also,
no workspace for the'"taping'operations has been provided. A
more convenient and rapid method of attaching the film to the
leader strip should be devised.
? The present location of the film transport control pushbuttons
used to accomplish loading operations are located on the side
of the viewer. The rear film spool cannot be observed from a
normal control operating position. However, if the controls
were located at the front of the viewer in close proximity to
both film spools, the operator could accomplish loading opera-
tions without having to physically move from the front of the
viewer.
Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873AO01300010016-3
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5) Anthropometrics
A wood and cardboard mock-up was inspected and an engineering drawing
of the rear screen viewer was reviewed. These provided gross di-
mensions of the viewer and the basis for the following comments:
Design Guide for Image Interpretation Equipment,
1969.
? Eyepoint Height
The center of the viewing screen is 39 inches above the floor and
coincides with the recommended height given in the Human Engineering
The microscope eyepoint height will, as presently being considered,
be at a fixed height from the floor. Engineering drawings indi-
cate that an eyepoint of about 45.0 inches for a Zoom 240 Stereo-
microscope with rhomboid attachments will be the fixed eyepoint.
height. Forty-five inches was calculated as follows: 25.0-inch
high kneewell, 5.0-inch thick light table base, and 15.0--inches
from table top to eyepieces. This height will comfortably accommo-
date the 95th percentile male operator if he sits on an 18.0-inch
high chair. For maximum comfort, a 20.5-inch high chair is re-
commended. The 18.0-inch high chair is necessary for thigh clear-'
ance.
Adjustable eyepieces capable of being inclined 0 through 60 degrees up
from the horizontal would provide an eyepoint.:adjustment of from
43.0 to 45.0 inches.
The small operator (5th percentile female) can comfortably use an
eyepiece no higher than 42.0 inches above the floor. However, she
could reach a 44.0 inch high eyepiece (and still have thigh clear-
ance) if she sat on a 18.0-inch high chair. A 2.5-inch high footrest
would be required.
STAT
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If the light table was made suitably adjustable so that the stereo-
microscope eyepoint height could be lowered to 40.0 inches and
raised to a maximum height of 47.5 inches, the 5th percentile female
and 95th percentile male could use the microstereoscope while seated
on chairs of recommended height.
o Kneewell
The kneewells for the viewer and the light table meet the minimum
requirements imposed by the Design Guide.
? Kickspace
Present console configuration provides a kickspace of 2-3 inches
deep. The Design Guide, page 4-30, recommends a kickspace 4 inches
high and 4 inches deep.
? Seating
Because the operator must move intermittently from the viewer to
the light table and back to the viewer,. and so forth, the present
standard government chair which is used in conjunction with other
viewing devices cannot be used. Since no operator chair is being
developed as part of the viewer, consideration must be given to
the type of operator chair which will conveniently interface with
the viewer.
Based on the calculations presented in the preceding section for
light table stereomicroscope eyepiece height, a chair adjustable
14.0 through 20.5 inches from the floor is required. This adjust-
ment range would accommodate the 5th percentile female and the 95th
percentile male operators.
6) Console Control Panel Layout
An engineering drawing of the control arrangement of the viewer console
control panel was reviewed..
Joystick location appears acceptable. An associated display which
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indicates when the film stage has reached its scanning limits is a
good feature. Location of a group of three pushbuttons which control
scanning mode direction; X, Y, or in both X and Y, is acceptable.
Illumination controls for screen and light table brightness, and the
image rotation control, are continuous position control knobs. They
should be serrated and at least .5 inches in depth and 1.0 inch in
diameter and have a resistance of no greater than 6 inch-ounces
(Design Guide, page 4-21). Present locations are acceptable.
The microswitch pushbuttons which will be used are backlighted and
labelled. The groupings appear adequate. With exception of the focus
controls, control type appears adequate for intended function. A
knob would provide better operator control for focusing. No specific
layout of the pushbuttons was decided upon.
The two film rolls are referred to as front and rear at the light
table and upper and lower at the viewer. One nomenclature should be
selected and used.
STAT
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Declassified in Part - Sanitized Copy Approved for Release 2012/08/29: CIA-RDP79B00873A001300010016-3