AD HOC COMMITTEE FOR J-3 SYSTEMS CAPABILITIES MINUTES FOR MEETING #2

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04767A000300050004-8
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: August 29, 2002
• Sequence Number: 4
• Publication Date: January 29, 1968
• Content Type: MIN

Approved For a ease 2002/0
DECLASS REVIEW by NIMA/DOD
- 178B04767NO003000
Ad Hoc Committee For J-3 Systems Capabilities
Minutes for Meeting #2
Date: 11 January 1968
Location: Westover AFB, Massachusetts
Prepared
Attendees
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-Introduction
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2 9 JAN 19 68
Polarization and Bi-Spectral experiments were performed with
1102. A quick analysis by the PET members revealed that there was
some loss in sharpness_when the polarizer filter was in use, however,
there was no noticeable degradation' as a result of the Bi-Spectral
filters.. Very good coverage and utilization of targets was also
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indicated at the PET meeting. The Program Director is expecting
support to continue throughout the J-3 series in order that
further system improvements can be evaluated.
that continued support should be no problem.
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Nearly all of the analysis to date has been associated with system
performance rather than item capabilit The 1101 O. N, 's are
presently at Westover and accessible td T The first test on 1101
was to determine that the slit change device did perform properly when
commanded. The exposure tests that followed were to determine if a
slit change over a given target would result in an increase or decrease
in image sharpness. The exposure report will be ready for publication
about the second week of February, A general discussion followed with
regard to final drafts being reviewed by committee members prior to 25X1A
publication. In summary, 0 directed that operationally classified .
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drafts be distributed to committee members for review and comments.
Pittman will contact each member about one week from distribution of
drafts. If no significant criticism develops, will submit drafts
to Publication. If suggested improvements require discussion, the drafts
will be held for review at the next committee meeting, if imminent, or a
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special committee meeting will be called to resolve the issues. The
purpose here is to insure that the community gets reports that are in
a useable format. Every effort will be made to minimize delay in
issuance of these reports. The System Capabilities Reports will be
distributed in the same manner and with the same distribution as the
reports. Classification and distribution of System Performance
Reports will be discussed at a later date.
-Filters
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The various filters tested thus far resulted in little noticeable
difference in imagery. A wider-band filter is scheduled for 1103 25X1A
after which a report on filters will be published. I Icautioned
filters. Bows inherent in gelatin filters led to the development of
glass filters, since it was assumed that glass was more rigid. Initial
lab tests indicated that the glass filters developed were not as good as
the comparable gelatins because of substrates. More hi hl polished 25X1
glass would solve this problem; however, because II have a 25X1A
. 005-inch thickness, attempted to make glass filters of the same
thickness. A thicker glass will be required for further polishing. The
problem is optical as opposed to coatings; however, a harder coating 25X1A
is desired. The resident office wants glass filters as soon as possible,
but will not apply more pressure at the present time. circulated
25X1A a filter des nation and description that differentiates between and
25X1 i filters. See Attachment 1. 25X1A
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I I -Summary-Proj Summary-Project
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Attachment 2 contains three Figures that were presented in view-
graph form by0 The bar graph in Figure #1 indicates the
departure, in terms of stops of camera exposure, of the target design
luminances from an "ideal" exposure. The criteria used for this ideal
exposure are that the target design brightness be recorded at the point
on the Type 3404 full process level curve where the maximum 1. 6:1
resolving power occurs. The portion of photography correctable by
use of the three condition processing technique is also indicated.
Figure #2 indicates some major reasons for departures of more than
1/2 stop from the ideal recording of the target design luminance.
Figure #3 is a plot of target design luminances, for a single target versus
solar altitude. The circles indicate forward-looking car ra data, while
the triangles indicate aft-looking camera data. Reasons for some of
the more significant departures in luminances for particular acquisitions
are pointed out by the arrows. The solid curve is a computer prediction
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for the luminance of a 25% reflection object on a clear day. The
dashed curves are ? 1 /2 stop from the solid curve.
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forming these measurements at Westover or advantages for performing
these measurements at NPIC.
L-HPL Density Measurements
At some point in time, Westover had agreed to make the HPL 25X1A
1. HPL changes daily until the day prior to launch
e
men s wit in five days
'% + after receipt of ON's, stated that Westover originally volun- 25X1A
teer
d t
e
o do the job for convenience, a
d.
es over, and with only this information, Westover would 25X1A
have d'ff 1
t
calculates frames (accuracy ? 2 frames) and approximate x-coordinate.
Within the specified time, only arbitrary target descriptions could be
provided W t
icu
y in locating targets. indicated that PI's, OAK's
and Polaroid prints available at NPIC would provide enough support for
his micro-D group to ccmp'lete 'the measur
t h
expe tent to perform he task at NPIC.
ti
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fullest cooperation, and that he sees no problems with the handling of
Zupport from the ACIC.
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-Schedule
presented a table of 23 items and associated ti
me
schedules required by in order that data will be analyzed and
Performance and Capabilities reports will be issued on schedule.
Attachment 3 is a tentative 1102 schedule that was formulated. Attach-
ment 4 is a blank schedule for 1103. Applicable dates for 1103 will be
forwarded by TWX and will be referenced to item number and schedule
column.
xcduded fr-:n aiirrafic
da+n r:i''? zrd
arrangements will be made for PI's to analyze Bi-Snectrai materi 1
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to determine gains or losses indicated by 1102 Bi-Spectral data. 25X1A
mentioned that snow and clouds affected some of the Bi-Spectral
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The remainder of the meeting was an informal discussion.
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decided that consideration should be given to establishing a
sub-committee under the direction of this committee to review the status
of pan geometry and to determine its applications to present and future
requirements of the cartographic community. ncv4 A
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1 The only problem encountered with 1102 engineering experiments
was the absense of DP's that should have been prepared for lI
Westover has agreed to prepare these dupes. The problem is attributed
to communications routing and will be solved for future missions by a
TWX from A group of overlays for selected 1000
series missions will be requested fort
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General Discussion- -Regarding Experiments
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circulated a hand-out of current plans for systems
capability effort. See Attachment 5. The following comments are
being considered by the committee:
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1. ill study best utilization of the polari-
zation filter under thel contract. 25X1A
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2.0 suggested that for comparison purposes SO-121 should
be flown simultaneously with Kodachrome II in 1105.
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3. Osuggested that the Night SO-340 test will be extremely
difficult to perform, and that perhaps a sun line test using 3400 or 3401
at minus solar elevation angles would be more fruitful. It was suggested
that SO-340 be delayed until arking problem is somewhat
solved.
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4.will investigate possibilities of a bread-board setup
for PI's to use in viewing Bi-Spectral material. also is
checking equipment available at
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