MISSION 1101 (CR-1) PHOTOGRAPHIC EVALUATION INTERIM REPORT

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B03817A000900010005-0
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: August 18, 2006
• Sequence Number: 5
• Publication Date: October 21, 1967
• Content Type: CABLE

Approved For Release 2006/08/18: CIA-RDP78BO3817A000
OUT63413
SUBJ: MISSION 1 101 (CR- 1) PHOTOGRAPHIC EVALUATION INTERIM REPORT
(PEIR)
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REF A.
B.
(`)
1. NUMERICAL SUM Ai Y
MSN NO AND DATES
1101-19
15-21 SEPTEMBER 1967
0
9 SEPTEMBER 1967
-
1-2,
11
21
2
LAUNCH DATE AND TIME:
VEHICLE NUMBER
CAMERA SYSTEM:
PAN CAMERA NO:
DISIC NO:
STELLAR RESEAU NO:
TERRAIN RESEAU NO:
RECOVERY REVS:
2. CAMERA SETTINGS
FWD-LOOKING
AFT-LOOKING
15 SEPTEMBER 1967/1941Z
1641
CR- 1
FORWARD-LOOKI NG,
AFT-LOOKING, 302
3
1,
IP
102
MSN
1101-1,
97
MSN
1101-2,
208
WRATTEN 23A FILTER (PRIMARY)
WRATTEN 25 FILTER (SECONDARY)
SLIT WIDTHS: 0.150, 0.171, 0.218,
0.272, AND A FAIL SAFE SLIT OF 0.250
INCHES.
WRATTEN 21 FILTER (PRIMARY)
WRATTEN 23A FILTER (SECONDARY)
SLIT WIDTHS: 0.134, 0.134, 0.175, 0.225
AND A FAIL SAFE SLIT OF 0.200 INCHES.
3. PERFORMANCE SUMMARY
A PAN CAMERAS: THE BEST PHOTOGRAPHY OF MISSION 1101 IS EQUAL
FROM MISSION 1101-2 IS JUDGED TO BE GOOD AND COMPARABLE TO THE
BEST EVER PRODUCED BY THE CORONA CAMERA SYSTEM.
B. DISIC
(1) STELLARE EVALUATION: THE FINAL DATA REDUCTION HAS
NOT BEEN COMPLETED BY THE USER GROUPS. 0 ANALYSIS INDICATES
TO OR BETTER THAN ANY PREVIOUS CORONA PHOTOGRAPHY. THE BEST PHOTOGRAPHY
FROM 1101 WAS OBTAINED WITH THE FWD-LOOKING CAMERA. THE AFT-LOOKING
CAMERA PRODUCED SOFTER IMAGERY THAN NORMALLY OBTAINED WITH THE
CORONA SYSTEM BECAUSE OF AN OUT-OF-FOCUS CONDITION (SEE SECTION
FOUR). SEVERAL CORN AND FIXED RESOLUTION TARGETS WERE RECORDED.
READINGS OF THESE TARGETS GIVE AN INDICATION OF THE SYSTEM PER-
FORMANCE THE BEST TARGETS OBSERVED YIELDED 25X1
RESOLVED DISTANCE ALONG THE LINE OF KLIGR777-7; C- 25X1
TION), AND TEN FEET ACROSS THE LINE OF FLIGHT (SCAN DIRECTION). THE
PHOTO INTERPRETABILITY OF THE FORWARD-LOOKING CAMERA PRODUCE GENERALLY
RANGES FROM, FAIR TO GOOD THROUGHOUT THE FIRST HALF OF THE MISSION
AND IS GENERALLY GOOD THROUGHOUT THE SECOND HALF OF THE MISSION. THE
PRODUCE OF THE AFT CAMERA IS CONSIDERED TO BE ONLY FAIR TO POOR FOR
PHOTO INTERPRETATION THROUGHOUT THE MISSION. THE OVERALL NFORMATION
CONTENT OF THE SECOND HALF OF THE MISSION IS IMPROVED, COMPARED TO
THAT OF THE FIRST HALF, IN ASSOCIATION WITH THE SHIFT IN PERIGEE
WHICH RESULTED IN LARGER SCALE PHOTOGRAPHY OVER THE PRIME TARGET
AREAS. THE IMAGE QUALITY OF THE FORWARD CAMERA PHOTOGRAPHY RECOVERED
THAT FOR THE FIRST HALF OF THE MISSION, THE STARBOARD CAMERA
RECORDED ENOUGH STARS FOR ATTITUDE DETERMINATION. IN FACT
siicatio Review by
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STARBOARD FRAME 5 RECORDED 6.5 MAGNITUDE STARS. THE PORT
CAMERA STAR FIELD WAS WEAK THROUGHOUT THE MISSION, AND USELESS
THROUGHOUT THE SECOND HALF. CHANGING ORBITAL PARAMETERS GRADUALLY
CAUSED BAFFLE-INDUCED FLARE TO DECREASE THE NUMBER OF STARS
RECORDED ON THE STARBOARD CAMERA DURING THE SECOND MISSION, SUCH
THAT, ATTITUDE DETERMINATION WILL NOT BE POSSIBLE FOR SOME OPERA-
TIONS. SOME OF THE FORMATS ARE SLIGHTLY DEGREADED BY VARIOUS TYPES
OF CORONA AND ELECTROSTATIC MARKINGS.
(2) TERRAIN EVALUATION: AS WITH THE STELLA M, THE USER 25x1
EVALUATION HAS NOT BEEN COMPLETED; HOWEVER, T4E CONSIDERED
THAT THE IMAGE QUALITY IS FAIR AND THE MATERIAL IS SUITABLE
FOR ATTITUDE DETERMINATION, RELATIVE ORIENTATION, AND AUXILIARY
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MAP MAKING, THERE IS9 HOWEVER, A LACK OF SHARPNESS. THE
FELT THAT THE TERRAIN PRODUCE DID NOT HAVE THE OPPORTUNITY TO
DEMONSTRATE ITS FULL POTENTIAL BECAUSE OF THE EXPOSURE CONTROL
PROBLEM, FILM PROCESSING CONDITIONS, AND THE LOW TEMPATERATURES
EXPERIENCED THROUGHOUT THE MISSION.
4. PAN CAMERA ANOMALIES
A. ALL THE PHOTOGRAPHIC IMAGERY FROM THE AFT CAMERA WAS DEGRADED.
THE BETTER CORN TARGET READINGS INDICATED THAT THE AFT CAMERA PRODUCED
APPROXIMATELY ACROSS TRACK RESOLUTIONS. 2,.l
CAUSE: THE AFT CAMERA WAS NOT CORRECILY FOCUSED. COMPUTED
ANSLYSIS OF LENS FABRICATION DATA SHOWED A BACK FOCUS SHIFT OF
1/1000 LESS THAN ANTICIPATED. IN ADDITION, AN AMBIENT VERSUS
ALTITUDE TEST HAS SHOWN AN ADDED SHIFT OF APPROXIMATELY ONE-HALF
OF A THOUSANDTH AT THE FOCAL PLANE. THE FORWARD CAMERA WAS
FOCUSED IN A POSITION THAT PERMITTED THE ABOVE CHANGES WITHOUT
GOING OUT OF FOCUS.
ACTION: AFTER FINAL TEST AND ACCEPTANCE OF EACH LENS,
A COMPUTER ANALYSIS OF THE ACTUAL FABRICATION DATA WILL BE
MADE. VARIATION FROM THE NOMINAL WILL ALSO BE CONFIRMED IN
THE LENS-ONLY TEST CHAMBER. THE RESULTS OF ;ELSE DATA WILL
BE USED FOR FINAL LENS SETTINGS. (MOJITOPo 25X1
IN MOST MEASURED CASES THE SCAN RESOLUTION WAS INFERIOR TO
THE FORWARD MOTION RESOLUTION.
CAUSE: DURING TESTING OF THE J-3 SYSTEMS, AN O?T I CAL/
MECHANICAL PHENOMENON ASSOCIATED WITH THE PANORAMIC CAMERAS
WAS OBSERVED WHICH EXPLAINS THE LOSS OF SCAN RESOLUTION. WHEN
THE SCAN HEAD LIFTS THE MATERIAL DURING THE ACTIVE PHOTOGRAPHIC
SCAN, A DIFFERENTIAL FILM VELOCITY IN THE DIRECTION OF SCAN IS
PRODUCED. THIS FILM VELOCITY IS PROPORTIONAL TO LIFT. AS LIFT
IS INCREASED THE APPARENT FILM VELOCITY AT THE SCP HEAD IS
ALSO INCREASED. THE LOSS OF RESOLUTION OBSERVED IS A FUNCTION
BOTH OF THE LIFT AND OF THE SLIT WIDTH AT THE TIME.
LABORATORY RESOLUTION TESTS WITH 0.134 I`CH 'SLITS EXHIBIT A ONE
TARGET READING VARIANCE BETWEEN THE SCAN AND IMC DIRECTIONS.
FORM MISSION 1101, LIFT U S INCREASED APPROXIMATELY E.904 INCH
AS A RESULT OF THE LOWER THAN NOMINAL ON-O:i_ IT TEMPER AT L'.
ACTION: THE THERAAL PATTERN HAS BEEN MODIFIED FOR 1192
AND TEMPERATURE SHOULD BE APPROXIMATELY TEN DEGREES WARMER THAN
1101. A TFST PROGRAM IS NOW BEING CONDUCTED TO REDUCE THIS
MOTION BY DETERMINING THE OPTIMUM RAISED POSITION OF THE DRUM
ROLLERS. ALSO ON 1102 A NEW HIGHER SPEED FILM IS BEING EVALUATED
WHICH COULD ALLOW FOR A SIGNIFICANT REDUCTION IN EXPOSURE TIME
(SLIT WIDTH). THESE ACTIONS WILL HELP TO MINIMIZE THE PROBLEM.
(MONITOR: 25X1
C. ON BOTH CAMERAS AT THE TAKE-UP SIDE OF THE FORMAT, THERE
IS A SMALL BAND OF SMEARED PHOTOGRAPHY. THE CONDITION DOES NOT
AFFECT ALL FORMATS.
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CAUSE: AS THE LEAD FOCAL PLANE (SCAN HEAD) ROLLER ENTERS
THE FORMAT IT DISTURBS THE FILM. THIS DISTURBANCE IS NOT
RECORDED BECAUSE THE EXPOSING SLIT HAS NOT ENTERED THE FORMAT.
WHEN THE TRAILING FOCAL PLANE ROLLER IMPACTS THE FILM, THE
AREA IMMEDIATELY ABOVE THE EXPOSING SLIT IS SMEARED BY THIS
DISTURBANCE. THE LOWER TEMPERATURES ENCOUNTERED ON THIS FLIGHT
MAY HAVE AGGRAVATED THE CONDITION BY LOWERING THE TRANSPORT ASSEMBLY.
ACTION: INCREASE THE CLEARANCE BETWEEN THE FOCAL PLANE
(SCAN HEAD) ROLLERS AND THE TRANSPORT ASSEMBLY GUIDE ROLLERS.
INCREASE THE DETAIL OF ANALYSIS OF THE "DR. A" TEST IN THE AREAS
1
NEAT THE END OF FORMAT. (MONITOR: 25X1
D. VERY MINOR FOG PATTERNS ARE PRESENT ON THE FIRST FRAME AND
NEXT TO LAST FRAME OF SOME CAMERA OPERATIONS IN 1101-1 AND 1101-2.
CAUSE: UNKNOWN - THE LIGHT LEAK PATTERNS EXHIBITED ON
1101-1 AND 1101-2 WERE EXTREMELY MINOR AND VERY DIFFICULT TO
LOCATE ON THE DP MATERIAL. THE VERY LOW DENSITIES AND MARGINAL
EQUIPMENT SHADOWS MADE CORRELATION I R CTICAL.
ACTION: IT IS THE OPINION OF THE THAT BECAUSE OF 25X1
THE MINOR NATURE OF THESE LIGHT LEAK FOG PATTERNS, NO LOSS
OF INTELLIGNENCE WAS INCURRED. NO ACTION IS RECOMMENDED.
E. THE HORIZON IMAGERY WAS NOT AS SHARP IN SOME CASE AS
NORMALLY EXPECTED. THIS WAS NEITHER "VEILING "q AS HAS OCCURRED IN
THE PAST, NOR DID IT APPEAR TO BE AN OUT-OF-FOCUS CINDITION.
CAUSE: THE CAUSE IS UNKNOWN. THE MOST PROBABLE CAUSE
IS THE TIMING OF THE SHUTTER OPENING SOLENOID WITH THE OPEN
POSITION ON THE SHUTTER. THAT IS9 THE SHUTTER SHOULD BE
CLOSED PRIOR TO THE END OF SOLENOID TRAVEL. THIS PROBLEM
IS NOT RELATED TO VIGNETTING.
ACTION: REVIEW PRESENT ASSEMBLY AND TIMING TECHNIQUES AND
RE-EVALUATE THE PHOTOGRAPHIC TEST DATA. (MONITOR: 25X1
F. ALL FOUR HORIZON CAMERAS PRODUCED VIGNETTED IMAGES. BUT
INPUT HORIZON IMAGES (FORWARD-LOOKING PORT SIDE, AND AFT-LOOKING
STARBOARD SIDE) DISPLAYED GENERALLY SIMILAR VIGNETTING. LIKEWISE,
BOTH OUTPUT HORIZON CAMERAS PRODUCED SIMILAR VIGNETTING PATTERNS BUT
DIFFERENCE FROM THE OTHER TWO HORIZON CAMERAS. THE TOTAL EXTENT OF
THE HORIZON LINE THAT WAS OBSCURED VARIED FROM 25 PERCENT TO ABOUT
40 PERCENT. PRELIMINARY MEASUREMENTS BY USERS TEND TO INDICATE THAT
THIS ANOMALY DOES NOT DEGRADE OPERATIONAL VALUE OF THE HORIZON
ARC IMAGERY.
CAUSE: A PART OF THE VIGNETTING HAD BEEN ANTICIPATED
BECAUSE OF OBSTRUCTIONS BY STRUCTURAL COMPONENTS OF THE SYSTEM.
HOWEVER, THIS CONDITION DOES NOT EXPLAIN EITHER THE EXTENT OR
VARIABILITY OF VIGNETTING THAT IS OBSERVED. TESTS AND ANALYSES
TO DATE AT A/P HAVE NOT PROVIDED A COMPLETE EXPLANATION OF THE
ANOMALY.
ACTION: (1) CO TINUE INVESTIGATION OF THE CAUSE OF THE
ANOMALY. (MONITOR: (2) DETERMINE WHETHER THE 25x1
ANOMALY HAS ANY OPERATIONAL SIGNIFICANCE. (MONITOR: x
G. MINOR SCRATCHES WERE OBSERVED WITHIN THE FORMAT A
AFT CAMERA. THESE SCRATCHES OCCUR INTERMITTENTLY THROUGHOUT THE
MISSION.
CAUSE: SIMILAR SCRATCHING WAS OBSERVED PRIOR TO FLIGHT
DURING THE READINESS TESTS. THE SCRATCHES WERE NOT CONSIDERED
TO BE SUFFICIENTLY DEGRADING TO DELAY THE FLIGHT. AS THE
FLIGHT PROGRESSED THEY BECAME LESS SIGNIFICANT.
ACTION: REVIEW TEST PROCEDURES TO DETERMINE POSSIBLE
MEANS FOR IMPROVED PREFLIGHT DETEC ION AND CORRECTION OF
SCRATCHING CONDITIONS. (MONITOR: 25X1
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H. STARTING MIDWAY THROUGH MISSION 1101-2, BREAKS IN THE
SCAN TRACE IMAGERY OCCURRED ON BOTH MAIN CAMERAS.
CAUSE: AS EMULSION BUILT UP ON THE RAIL EDGES, IT
EXTENDED INTO THE PROJECTED SCAN TRACE.
ACTION: ALTHOUGH HIGHLY POLISHED RAIL SURFACES HAVE
BEEN INTRODUCED TO REDUCE RAIL SCRATCHING, THE CONDITON HAS
NOT BEEN ELIMINATED. THE DOES NOT CONSIDER FURTHER ACTION
TO BE WARRANTED.
I. LOSS OF SOME RAILS HOLES ON BOTH CAMERAS OCCURRED.
CAUSE: THE FILM EMULSION FILLED SOME OF THE RAIL HOLES
AS THE MISSION PROGRESSED. SOME WERE FILLED PRIOR TO LAUNCH.
ACTION: EFFECTIVE WITH CR-2, THE RAIL HOLES ARE FILLED
WITH A TRANSPARENT SUBSTANCE. THIS IS EXPECTED TO SIGNIFICANTLY
REDUCE THE POSSIBILITY OF LOST RAIL HOLE IMAGES DUE TO HOLE
FILLING. THE NUMBER OF RAIL HOLES THAT FILLED DURING THIS
MISSION WAS COMPARABLE TO THOSE OBSCURED IN J-1 PG FLIGHTS.
J. DURING THE FIRST 22 REVS OF THE MISSION, THE V/H PROGRAMMER
DELAY TIMER APPEARED TO BE TIMING OUT EARLY, BUT RANDOMLY. THIS
EARLY TIME-OUT CAUSED A V/H MISMATCH.
CAUSE: CROSS CORRELATION OF TIMER TIME-OUT AND REAL-TIME
COMMANDING REVEALED THAT THE EARLY TIME-OUTS OCCURRED ONLY DURING
THOSE REVS THAT REAL-TIME COMMANDS WERE SENT DURING THE TIME WHEN
THE TIMER WAS COUNTING. IN VIEW OF THIS, ALL REAL-TIME COMMANDING
WAS RESTRICTED DURING THE INTERVALS WHEN THE DELAY TIMER WAS
COUNTING. SUBSEQUENT IN-FLIGHT TESTING ON NON-PHOTOGRAPHIC REVS
VERIFIED THAT THE PROBLEM COULD BE DUPLICATED BY VIOL THE
COMMANDING RESTRICTION. DURING SUBSEQUENT TESTING AT THE
PROBLEM WAS DUPLINATED USING THE CR-2 V/H PROGRAMMER ANL) ACED
TO TRANSIENTS GENERATED BY THE REAL-TIME COMM SOCIATED CIRCUITRY.
ACTION: A RE-DESIGN CURRENTLY UNDERWAY AT TO FILTER
OUT THE TRANSIENTS $
(_CAUSED BY THE REAL-TIME COMMAND ASSOCIATED
CIRCUITRY. ADDITONALLY, THE CIRCUITRY CAUSING THE TRANSINTS
WITL BE MODIFIED TO INCORPORATE IMPROVED ARC SURPRESSION. THEN
RE-DESION WITL BE THROROUGHLY EV LUATED PRIOR TO THE CR-2 (1102)
FLIGHT. (mnNTTnpt
K. THE M AGES REPORTED THAT THE BINARY DATA BLOCK
WAS MISSING ON THE LAST FRAME OF ALL OPERATIONS AND OCCASIONALLY
MISSION ON THE SECOND TO LAST FRAME.
CAUSE: THIS LAS THE NORMAL MODE OF OPERATION AND INHERENT
TO THE BASIC CR-1 SYSTEM DESIGN.
ACTION: THE DESIGN IS BEING CHANGED, EFFE v`r WTTH 11
-2,
SUCH THAT THIS WILL NOT RE-OCCUR. (MONITOR:
L. THROUGHOUT THE MISSION, THE DISIC EXPOSURE MAND
FAILED TO SWITCH TO THE 1/500 SECOND POSITION AT THE PREDICTED TIMES.
CAUSE: A REVIEW OF THE TAPE RECORDER DATA AND FLGOHT
REQUIREMENTS LIST CONFIRMED THAT THE TIMER WHICH CONTROLS THE
DISIC TERRAIN EXPOSURE WAS IMPROPERLY SET PRIOR TO LAUNCH. THERE
WAS NO HARDWARE PROBLEM BUT RATHER A PROCEDURAL ONE.
ACTION: THE PROCEDURES HAVE BEEN CORRECTED.
M. STARBOARD AND PORT HORIZON IMAGERY AND FIDUCIALS ARE MISSIVNG
ON FRAMES 76, 78, AND 80 OF PASS D06 OF AFT CAMERA.
CAUSE: A REVIEW OF THE FILM REVEALS THE PRESENCE OF A
NORMAL DATA BLOCK ASSOCIATED WITH EACH OF THE AFFECTED FRAMES.
THIS ISOLATES THE PROBELM AREA TO A HOLDING RELAY AND THE ONE-
HALF RPC SWITCH. PAST HISTORY WITH CAM ACTUATED SWITCHES HAS
SHOWN THAT LOW TEMPERATURES REDUCE THE OVERTRAVEL. SWITCHES
WITH MARGINALLY ADJUSTED OVERTRAVEL HAVE TYPICALLY Ft T
TO ACTUATE WHEN SUBJECTED TO LOW TEMPERATURES. THE
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BELIEVES THAT THIS IS THE MOST LIKELY CAUSE FOR THIS INTER-
MITTENT FAILURE.
ACTION: VERIFY THAT OVERTRAVEL ON ALL SWITCHES ARE
CHECKED ATIIPRIOR TO FLIGHT. (MONITOR: (2)
INSURE THAT THERMAL PAINT PATTERN IS PROPER FOR IRE 0 BE
FLOWN. (MONITOR: 25X1
N. IN REVIEWING T , INSTANCES OF DATA BLOCK
ANOMALIES WERE NOTE
CAUSE: TO DATE, HAS READ APPROXIMATELY 25 PERCENT 25X1
OF THE DATA BLOCKS, CONSEQUENTLY THE DATA IS NOT SUFFICIENT TO
DRAW CONCLUSIONS
ACTION: (1) II WILL SUPPLY THE CORONA RESIDENT OFFICE 25x1
WITH A LIST OF ALL IMPROPER DATA BLOCKS WITH DESCRIPTIONS OF DATA
BLOCK ANOMALIES AND OTHER DATA MARK (SMEAR PULS . , ETC.)
ANOM ON THE ASSOCIATED FRAMES. (MONITOR: 25X1
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PERFORM ANALYSIS TO ISOLATE ANY PROBLEMS. (MONITOR: 25x1
DISIC ANOMALIES
A. THE FIRST FRAMES OF MANY PORT STELLAR OPERATIONS WERE
DEGRADED BY A HEAVY PLUS-DENSITY WAFFLE PATTERN ON THE PORT FORMAT.
OCCASIONALLY, ADDITIONAL FRAMES WERE AFFECTED.
CAUSE: MECHNAICAL AND/OR ELECTROSTATIC MARKING CAUSED BY
THE COARSE TEXTURE OF THE PLATEN PRESSURE PADS AND HEAVY PLATEN
PRESSURE.
ACTION: INVESTIGATION OF A FINER-TEXTURED PRESSURE PAD AND
REDUCTION OF PLATEN PRESSURE TO A MINIMUM ACCEPTABLE FOR FILM
El ATWESS IS N PROGRESS AT ARBOR ON DISIC NUMBER EIGHT. (MONITOR: 25x1
B. THE STELLAR FILM IS FOGGED DURING EXTENDED NON-OPERATIVE
PERIODS ON FIVE TO SIX FORMATS WHICH LIE BETWEEN THE PORT AND STAR-
BOARD UNITS. DEGRADATION IS MINOR TO SEVERE, DEPENDING ON THE DURATION
OF THE SIT PERIOD.
CAUSE: THE LIGHT LEAK IS CAUSED BY A LOOSE SEAL
BETWEEN THE DISIC COVER AND TERRAIN LENS.
ACTION: (1) 0 TO INVESTIGATE NEW MATERIALS FOR THE 25X1
ROVED INSTALLATION PROCEDURES. (MONITOR: 25KI
(2) TO INVESTIGATE LIGHT LEAK TEST METHODS
FECTIVENESS OF THE DISIC LIGHT SEALS. (MONITOR: 25x1
C. MOST STELLAR FORMATS ARE AFFECTED BY GENERAL FOGGING, OFTEN
HEAVIER IN ONE AREA OF THE FORMAT AND USUALLY HEAVIER ON THE PORT
THAN ON THE STARBOARD. DEGRADATION RANGES FROM MINOR TO SEVERE,
WITH SIGNIFICANTLY HEAVIER DENSITIES NOTED ON THE SECOND MISSION. A
LOSS OF STAR IMAGES IS EVIDENT ON THE MORE HEAVILY FOGGED FRAMES.
CAUSE: THE PRIMARY CAUSES ARE BAFFLE SURFACES WHICH
ALLOW REFLECTIONS INTO THE LENS FROM BOTH RELATIVE SUN POSITION
AND EARTH ALBEDO. ABRUPT CHANGES IN FLARE DENSITY ARE APPARENTLY
CAUSED BY SLIGHT CHANGES IN VEHICLE ATTITUDE AT THE
TIME OF PAN CAMERA STAR SHUT-DOWN.
N TO REDUCE FLARE. (MONITORS:
S
A5S0C1A1 ICLE TITUD TTOIIONEWITHATHET
A
B
.
A
RUPT
CHANGES IN F ERS ON
1158 AND 655, MISSION 1101-2.
(MONITOR: (3) TO INVESTIGATE THE EFFECTS
P
REFO FOR RESEAU ILLUMINATION. MONITOR:
U. FORMS OF MARKING WERE OCCASIONALLY NOTED ON THE
STELLAR RECORD. IMAGE DEGRADATION CAUSED BY THESE MARKS HAS NOT
BEEN DEFINITELY ESTABLISHED BY THE USERS, BUT IS NOT CONSIDERED
ACTION: (1) TO INVESTIGATE POTENTIAL
n I 1 I C M r fl I T .. n
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SEVERE.
CAUSE: THIS MARKING IS ATTRIBUTED TO ELECTROSTATIC
CAUSES; THESE FORMS HAVE BEEN NOTED IN PREFLIGHT ENVIRONMENTAL
TESTING OF THE SYSTEM.
ACTION: CONTINUE CORONA INVESTIGATION INITIATED AS A RESULT
r.-......,
OF
R
P
EFLIGHT
E. SEVERAL VERY SMALL MINUS DENSITY SPOTS NOTED ON ALL TERRAIN
AND STELLAR FRAMES. IMAGE DEGRADATION IS CONSIDERED MINOR.
CAUSE: PROBABLE CAUSES OF THESE MARKS ARE FLAKED PAINT AND DUST
ON THE BACK RESEAU SURFACE AND DIRT/EMULSION PARTICLE
BUILD-UP BY THE METERING ROLLER.
ACTION: ACTION HAS PREVIOUSLY BEEN INITIATED TO IMPROVE APPLICA-
TION OF INTERNAL LENS BARREL ND PRE-FLIGHT CLEANING
PROCEDURES. (MONITOR: 25X1
F. CORONA-TYPE MARKS A NG BOTH EDGES OF THE ENTIRE STELLAR
RECORD. THE MARKS VARY IN INTENSITY BUT REMAIN OUT OF THE ACTIVE
FORMAT AND OFF THE SLP DATA.
CAUSE: MARKS ARE CAUSED BY PRESSURE OF THE SKEW BEAD
HOLLERS IN THE DISIC EXIT BOX.
ACTION: MARKS ARE NORMAL IF THEY REMAIN OUT OF THE
ACTIVE FORMAT AND OFF THE SLP DATA. SKEW BAR ADJUSTMENTS WILL
--"-. __
ACCIID7 THAT T
HE
R KS RE
AI
F
~- ...,
l
N OU1 O
It1C. PUKIT)AI. (MONITOR: 25X1
U. VtHY FLAT (LOW CONSTRAST) APPEARNCE OF MOST TERRAIN PHOTOGRAPHY.
CAUSE: OVEREXPOSURE.
ACTION: THE ANOMALY DISCUSSED IN 4L ABOVE WAS THE MAJOR
CONTRIBUTOR TO OVEREXPOSURE. FILM SELECTION, EXPOSURE SETTINGS,
AND PROCESSING FOR Tw, NEXT DISIC MISSION ARE UNDER INVESTIGATION. 25X1
(MONITOR
6. COMMENTS.
A. THE AFT CAMERA OUT-OF-FOCUS PROBELM RAISES INTERESTING
QUESTIONS. THAT IS9 WHAT IS THE RELATIONSHIP BETWEEN GROUND AND
FLIGHT FOCUS AND IS THE FOCUS, AS SET ON THE GROUND, BEST FOR THE
FLIGHT SITUATION? TO ANSWER THIS FUNDAMENTAL QUESTION A THROUGH
FOCUS TEST IS BEING PLANNED FOR CR-3. A SECOND W'S ES
AS TO THE RELATIONSHIP BETWEEN THE RESULTS OF1
DYNAMIC RESOLUTION TESTING. THIS RELATIONSHIP IS BEING STUDIED
NOW TO INSURE THAT EACH CORONA FLIGHT WILL HAVE THE OPTIMUM FOCUS
SETTING.
B. BECAUSE OF THE SCAN RESOLUTION LOSS DISCUSSED UNDER PARA. B
OF SECTION 4, THE F__ BELIEVES THE O- TEST SCHEDULED FO
R 1102
WILL BE EXTREMELY SIGNIFICANT. THE REPRESENTATIVE HAS ASSURED THE
GROUP TH
AT SUFFICIENT QUANTITYND
A Y SUPPLIES OF SO-230 ARE
AVAILABLE TO INCREASE THE MAGNITUDE OF THE TEST IF DESIRED. THE TEST
IS PRESENTLY SCHEDULED TO INCLUDE FEET ON THE FWD CAMERA AND
1,500 FEET ON THE AFT CAMERA. THE RECOMMENDS THAT THESE AMOUNTS
BE INCREASES TO 2,000 FEET AND 2,500 FEET RESPECTIVELY, THEREBY
ALLOWING A MORE COMPLETE EVALUATION OF THE SO-230 FILM.
T 0 P S E C R E T
END OF MESSAGE
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