STATUS REPORT FOR PERIOD 1 JUNE THROUGH 30 JUNE 1970 U.S. GOVERNMENT CONTRACT(SANITIZED)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A001300010012-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 22
• Document Creation Date: December 28, 2016
• Document Release Date: August 29, 2012
• Sequence Number: 12
• Publication Date: June 1, 1970
• Content Type: REPORT

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STATUS REPORT
for period
1 June through 30 June 1970
U.S. GOVERNMENT
File No. 11038
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This document is presented as the Monthly
Status Report under Contract to the U. S.
Government,
The report period represented herein covers the
period 1 June through 30 June 1970.
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fUJ INDEX.
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Program Status Summary 1
Task 11 Stage Drives T11-1
Tasks 16, Viewing Optics, Viewing Illumination,
I17 & 18 Reticle Projector and Illumination T16, 17 & 18-1
Task 23 Optics Drive Assembly T23-1 thru 4
Task 24 Image Analysis System
T24-1
Task 36 Overall Assembly T36-1
Task 43 Computer Programming T43-1 & 2
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APPENDICES
Packaging Details of the Stereocomparator
Optical System Appendix I
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PROGRAM STATUS SUMMARY
Scheduled percentage of completion 95.6%
Actual percentage this date 89.5%
This report period is significant because the optics
assemblies have been installed. The alignment of the.optical
system is in process, so far without significant problems. Check-
out and response of the optics drives is underway. Satisfactory
servo drive performance is being achieved.
Analysis is underway to provide information in order -
to eliminate the 20 hertz resonance in the stage drives.
The Image Analysis System has been checked out
and found to be satisfactory and will be installed on completion
of the optics drive checkout.
The substitution of real formats and unitS for bogus
formats and units in the software is nearly complete. The sub-
routines are being rewritten to take advantage of the additional
16K of computer core to be available shortly.
-1-
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TASK 11
STAGE DRIVES
Scheduled percentage of completion 1 00%
Actual percentage this date 96%
Force displacement tests were performed on the
right stage and left stage mechanical system in an effort to isolate
the structural compliances causing the 20 hertz resonances'
mentioned in our last report.
The more significant compliances have been isolated
and corrective measures are being analyzed. Mechanical stiffening
as well as electronic compensation are under investigation.
T1 Y- 1
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TASKS 16, 17 & 18
VIEWING OPTICS VIEWING ILLUMINATION
RETICLE PROJECTOR and ILLUMINATION
in?
Scheduled percentage of completion 100%
ral
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Actual percentage this date 100%
The optical subassemblies have been received by
from the optical subcontractor. These assemblies were
received apparently in an undamaged condition, and all parts
have been 'installed in the Stereocomparator. Optical align-
ment is in process. See Task 36.
An additional report on the design of the shipping
containers is included with this report as Appendix I.
Additional information on the shipping containers
and system was previously provided as Appendix II. in the May,
1970, report.
T16, 17 & 18 - 1
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TASK 23
OPTICS DRIVE ASSEMBLY
Scheduled percentage of completion 100%
Actual percentage this date 96%
With the arrival of the optics assemblies from the
subcontractor, work on the optics drives has resumed.
It was found that an amplifier with a current output
control instead of voltage output control greatly improved the
mechanical performance of the system.
Another advantage of the current-output driver is
that most of the system constants disappear. For example, a
motor driven from a voltage source (zero output impedance) has
the following system equation:
where
/K
o
E.
1 s2 s + 1)
s `KKt KK
e et
eo = output shaft angle
E. = .amplifier output voltage
Ke = back emf constant of the motor
Kt = torqd4e factor of the motor
L = armature inductance
R = armature resistance
J = total system inertia
T23 - 1
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As can be seen, this system equation shows one integration plus a
more or less damped quadratic term, with the damping roughly
determined by the ratio r/
A current-driven motor (infinite source impedance)
has the following equation:
ist 00 = Kt
T 2
? I S
row
where I is the amplifier current and the other terms are as described
previously. As can be seen, the system equation is independent of
the back emf of the motor and the armature resistance and inductance.
The presence of two simple integrations makes the basic tachometer
(rate) loop cancel only one of the integrations, so that a Type II
system results which has zero velocity - following error. Thus,
the servo system characteristics are independent of speed, which
produces good dynamic tracking.
This system is being exploited- extensively in the
optics drives, with very good effect.
The status of the optics drive loop compensation
and phasing work is as follows:
A) The illumination zoom loop has been com-
pensated, giving a 20 Hz rate loop bandwidth and a 4.5 Hz position
loop bandwidth. A Type II system, with no velocity - following error.
B) Image rotators are complete, with a 50 Hz rate
loop bandwidth and 4.5 Hz position bandwidth.
Anamorph rotators are complete, a 35 Hz rate
loop bandwidth and a-2 Hz position loop bandwidth. This system
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has a great deal of dry friction because of the slip rings and has a
very large overhauling torque due to mechanical unbalance in the
unit. It was found necessary to prevent the rate loop from saturating
in order to maintain even rotational rates while slewing. This
restricted the rotation rate to I turn in 4 seconds, but since there
are two positions of the anamorph rotator which give the same
stretch axis, the time required to reach alignment is two seconds
maximum, since 180 degrees is the maximum required motion.
D) Reticle anamorph rotator compensation is
complete. In order that the reticle alignment would not be disturbed,
this system was not measured for bandwidth, but it greatly exceeds
that of the main anamorph. which it follows. Additionally, since it
Is a Type II system, there is no velocity - or position - following
error.
E) Main zoom loop compensation has. begun. Due
to the great size of this system physically, a somewhat reduced
rate loop bandwidth is contemplated in order to reduce wear. The
usual 4.5 Hz position loop bandwidth is
All of the above systems
and position loops, so that there will be
computer-driven or manual
pleasing optical effect.
Final phasing
anticipated.
are overdamped in both rate
no overshoot in either the.
operating ?modes. This produces a very
(wire-swapping) and
necessary modifi-
cations to include the current output amplifiers are nearly complete
for the above systems, and phasing of the main and follow-up
systems has been implemented.
T23 - 3
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It is expected that during the next report period
the remainder of the optical loop compensation will be completed,
with the exception of the automatic brightness control loop, which
cannot be started until final optical alignment is complete.
T23 - 4
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TASK 24
IMAGE ANALYSIS SYSTEM
Scheduled percentage of completion 100%
Actual percentage this date 98%
The
Image Analysis System has been received
The equipment was set up in the test fixture and tested.
The video raster scan was reconstructed and determination of
scanning axes made. Tests with the 1:1 test slides indicated good
zero adjustment, with correlation readily obtained. The equipment
did not, therefore, sustain any ill effects from shipment, and this
system is ready for installation into the Stereocomparator upon
completion of alignment of the optical systems.
T24 - 1
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TASK 36
OVERALL ASSEMBLY
'Scheduled percentage of completion 100%
Actual percentage this date 90%
During this report period the optical elements
were uncrated and assembly to the Stereocomparator was started.
The illumination system, lamphouse, variable diaphragm, and
zoom condenser have been installed and aligned per instructions.
The center optical bridge and both side optical bridges have been
installed and alignment is proceeding.
T36 - 1
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TASK 43
COMPUTER PROGRAMMING
Scheduled percentage of completion 100%
Actual percentage this date 93%
At the time specifications were written for subcon-
tracting the writing of the computer program, it was not clear what
formats and/or units would be used for teletype input of camera
parameter information. Furthermore there was a possibility that
some of this information might be classified. For the sake of def-
initeness and in order to avoid any possible need for classification,
the subcontract specifications were written in terms of bogus formats
and bogus units, with the intention that
the prime contractor)
would itself perform a modification to incorporate real formats and
real units. The in-house modification has been under way for a
number of months but intensively so during this report period, and
is now nearly completed.
Since the Stereocomparator hardware has not yet
been assembled sufficiently to permit final debugging of the com-
puter program, the subcontractor has not yet made formal delivery
of ths computer program
Nevertheless, the partially de-
bugged tapes and listings of the program are available
T43 - 1
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Such of these as apply to the teletype input were used in producing
the in-house modified siersioA, for real formats, etc. Although de-
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bugging these particular portions of the program should not, in prin-
ciple, depend on availability of the Stereocomparator hardware,
yet they were found to still contain a number of problems.
In undertaking to incorporate the real formats, etc.
it was found that the bogus formats which were written into the
specifications did not have the full variety of the real formats.
This circumstance and the fact that there were still problems in
the existing tapes prompted a decision to substantially rewrite
some of the subroutines so as to provide more generality.
The in-house modification is being performed in two
stages - the first of which has now been completed. In the first
stage the various subroutines were rewritten, as required, to incor-
porate all necessary provisions for the full variety of the real for-
mats - but to nevertheless still operate with the bogus formats.
This allowed compiling and debugging the coding openly and provides
a program which can be run openly with the hardware when it is com-
pleted. The second stage will be to actually incorporate the real
formats into the revised coding. This is a relatively minor proce-
dure and should be completed early in the next report period.
T43 - 2
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Packaging Details of the Stereocomparator Optical System
This appendix is intended to supplement Appendix II
of the report of 1 May to 31 May 1970, concerning the shipping
of the optical system. It is hoped that these additional details
will aid in the analysis of the design concept used in the packaging
of this system.
All crates made
were of double con- STAT
struction with heavy gauge plastic "balloons" between the inner
and outer cases, with the exception of the reticle branches. The
reticle system had an additional third outer case, which was sep-
arated from the middle case by semi-hard rubber cubes in the cor-
ners and additional rubber mounts were also placed at suitable
intervals between the middle and exterior cases. The construc-
tion of all interior cases consisted of a basic frame and sheeting
technique. Frame members varied in size from 1" x 6" heavy sup-
ports to 1" x 2" material used as a frame for mounting the 3/8".
plywood sheeting. The 1" x 6" members were felt covered when
equipment rested on them. Also, each unit of the system was pro-
tected by a pre-sized plastic bag for protection from dust and dirt.
The exteriors of all boxes, and the middle case of boxes 6 and 7,
were constructed of wood that measured 8-1/4" x 5/8". Boxes
1, 6, and 7 had hinged tops and sides, while the other boxes only
had hinged tops. The hinges enabled all the boxes to be reusable.
APP. I - 1
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The balloons, in an unmounted state, measured
12" x 8" x 3" and were approximately three-fourths inflated. How-
ever, after mounting, they were approximately 5" thick and acted
as if they were fully inflated. This was due to the method of
mounting used
The balloons were stapled to the
Interior of the exterior case, (middle case on the reticle cases),
In such a manner as to cause the 12" dimension to decrease to
about 10.5" or 11". This had an "inflating" effect on the balloons
and caused them to be very rigid. The plastic used for the balloons
was 0.012 inches thick.
The interior case of box #1, which contained the
main optical bridge, me,4sured L80" x W45" x H26.5" and its
bottom rested on 34 balloons. The optical bridge is said by Sopelem
to weigh 580Kg. The length by height dimensions had 12 balloons
each, the width by height dimension also had 12 balloons each,
but packed more densely than the other, and the top of case had
16 balloons. The exterior box measured L88" x W52" x H35".
The interior case of box #2, which contained the
right illumination system, measured L60" x W27" x H26" and its
bottom rested on 24 balloons. This unit is said to weigh 110Kg
The length by height dimensions had .12 balloons
each, the width by height dimensions had 6 balloons each, and the
top had 12 balloons. The exterior of the case measured L67" x
W33" x H34".
APP. I - 2
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Box #3, which contained the left illumination sys-
tem, had interior case dimensions of L60" x W27" x H26". The
left illumination system is said to weigh 110Kg. Its interior case
rested on 15 balloons. The length by height dimensions had 12
balloons each, the width by height dimensions had 6 balloons each,
while the ter) had 12 balloons. The exterior dimensions of box
#3 were L67" x W33" x H34".
The interior case of box #4, which contained the
condensers, measured L22" x W17" x H18". Its bottom rested
on .4 balloons, with both condensers said to weigh 50Kg
The length by height dimensions had 4 balloons each, the width
by height 2 balloons each, and the top had 3 balloons. The ex-
terior of box #4 measured L30" x W24" x H26".
Box #5, which contained both variable diaphragms,
had an interior case dimension of L32" x W16" x H18". These
units were said to weigh 40Kg by and the interior case
rested on 4 balloons. The length by height dimensions had 4
balloons each, the width by height had 2 balloons each, and the
top had 4 balloons. The exterior case dimension was L40" x W23"
x H26".
The interiors of boxes 6 and 7, which contained
the reticle system, is said to weigh 454Kg, measured L59" x W36"
x H45. The bottom rested on 20 balloons. The length by height
dimensions had 14 balloons each, the width by height had 10 balloons
APP. I - 3
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*10,
each, and the top had 14 balloons. The middle case measured
L67" x W42" x H50" and was separated from the exterior case by
the semi-hard rubber blocks. The exterior case measured L76"
x W-50" x 1161'.
APP. I - 4
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