MISSION 1112 PHOTOGRAPHIC EVALUATION INTERM REPORT (PEIR)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B03826A000300070042-9
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 6
• Document Creation Date: January 4, 2017
• Sequence Number: 42
• Publication Date: January 8, 1971
• Content Type: CABLE

Approved For Release 2008/09/16 CIA-RDP78B03826A000300070042-9 ~ ~ ""~'"'~
~ - I'~~
*' SECRET
S~AN7i o i 3~
DuI. 11~`1~
i M 1 SS I ON 1112 PHOTOGRAPHIC EYALUAT I ON I NTERM REPORT CPE 1 R )
25X1
25X1
1. NUMERICAL SUMMARYs
MSN NO DATESs 1112-1, 18-27 NOV 70 REC. 27 NOY 70/23092
1112.2, 2'j NOV - 7 DEC REC. 7 DEC 70/22242
LAUNCH 0 ATE T I ME s 1$ NOY 70/21292
YEH 1 CLE NO s 165$
CAM S YS s QR -2
PAN CAMSs AFT LOOKING 300, FILM 7$00 FT. 3414; 1080 F? 3404;
?500 FT. 3414
FWD LOOK! NG 301, FILM 7$00 FT 3414; 1000 FT 3404;
?500 FT 3414
DISK UNITS $
STELLAR LENS PORT F/2.8 1.5 SEC NO F 1 LTER ?~-{~"~~~- - ~~~~~~:orr
STBD F/2.$ 1.5 SEC NO FILTER ~~~~ ~~ ~~~~~~~
FILM T YPE s 34 01 ~ -- - ----
TERRAIN LENS F/4.5 WITH MODIFIED F/6.3 SHUTTER 1/j00 SEC CFI~Bt~B~ ~.~=~',
W-12 FILTER ___ >-
FI LM TYPES 3400 _____
REC REVSs MSN 1112-1, REC 14? ~~
MSN 1112-2, REV 309
-
--
LAUNCH W I NDOW a 21252 T 0 22252, 1$ NOV 70 ~ ---. _. _
______
2. CAM SETT i NG s ~
FMIO LOOKI NG s W-25 GLASS tPR IM) I ~ ~~
,
W-25 GLASS tALT) _
_
_ ~ _-. _-i,
SLIT W I OT H PO S 1 0.1554 INCH ~!
~_
__.
POS 2 0.189 INCH 4
!
POS 3 0.250 LNCH ~
POS 4 0.320 INCH _._
_~
FAIL SAFE 0.259 INCH
AFi LOOKI N6 s W-23A GLASS CPR IM) ~

W-23A GLASS CALT) _
SLIT w l DT H P OS 1 0. 125 i NCH ~

POS 2 0.160 I NCii _
_
POS 3 0.205 INCH -- - _ ,
POS 4 0.267 INCH ~---
___ - -
__
FA 1 L SAFE 0.219 1 NCH `
~
~ ~ ----_.
3� PERFORMANCE SUMMARY
------- -- - - _.~ ~

A. nE vYER ALL IMAGE QUALITY OF MSN 1112 1 S GOOD AND C ~.
_ _ ---- ,
__ ._ _ __
TO THE BEST OF THE CR SYSTEM. IMAGERY RETAINS ITS SHARPN�S -------...~_ __._. '__
MAGNI FI CAT t ONS A80VE 50 TIMES. - AN M 1 P OF 115 WAS ASS t GNED FOR ~~,y,,r.;.-, _;
1112-1 AnD 1112-2. ?HE MIP CHIP FROM MSN 1112-1 IS CONSIDERED T9~ia.~ ~- ,
'"

BEST EVER ACHIEVED BY A CORONA SYSTEM. THE PER ATTRIBUTES THE ~'Y-=m~~w�~. .
~,
f MPR OVED QUALITY OF ? HE IMAGERY T O A COMB i NAT I ON OF
C1) GLASS FILTERS INt~RPORATED ON THIS SYSTEM.
C2) QUALITY OF 3$14 FILM.
C3) IMPROVED FOCUS TECHNIQUES BEING UTILIZED ON PROGRAM.
C4) GEOMETRIC STABILITY OF ?HE QR-2 CAMERA SYSTEM.
CORN TGT READINGS C2 s 1 CONTRAST AT THE LENS) FOR THE MSN ARE PRESENTED
~~ {
~~~~
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BELOW. READINGS ARE THE AVERAGE OF SEVEN READERS FROM ANO THE 25X1
PE? TEAM. ?HE AVERAGE RESOLUTION OF 1 S CO~SI~ER 0 EXTRE- 25X1
MELY GOOD FOR A CORONA SYSTEM. MEAN ON ORBt? RESOLUTION OF BOTH CAM-
ERAS APPEARS ?0 HAVE BEEN APPROX 138 L/MM WITH THE BEST GROUND RESOL-
UF I ON REPRESENTING CAMERA PERFORMANCE I N EXCESS OF 180 L/MM. THE CORN
READ i LAGS FROM OR 16 I NAL NEGAT ! VES AND DUPE POS 1 T IVES SHOW AN APPROX
1S PCT LOSS IN RESO
25X1
d. PI SUITABfLITYs REPORTED "THE PI SUITABILITY FOR 25X1
TH i S MSN RANGES FROM POOR W I T H THE LARGEST PORTION FALLING I N
THE FAIR CATEGORY. THE MAJOR FACTOR FOR THE POOR RA? 1 LAGS f S SMALL SCALE
Ott TO HIGH ALT ITUOES. THE PHOTO I NTERPRETERS REPORT THAT MOST
IMAGERY IS VERY SHARP BUT LA GALE NEEDED FOR 'GOOD' I LATER- 25X1
PRETAT ION SUlTAB ILITY." THE COMMENT 1 S BORNE OUT BY THE FACT
THAT THtS MISSION RECEIVED T LOWEST PERCENTAGE C6 PCT) OF
PRIORITY ONE TARGETS RATED G000 IN THE ENTIRE 1108 SERIES. ?HE OfFF-
ERENCE BETWEEN THE PE?' S "EXCELLENT" RATING ANO THE P 1 SUI TAB 1 L ITY
RAT 1NG OF "FAIR" REQUIRES CL AR 1 FI CAT I ON. THE TWO MAJOR CONTR 1 BUT I NG
EFFECTS ARE SGALE ANO LOSS OF STEREO. OUR 1 NG M I SS t ON 11 t2-1 THE
STEREO GOVERAGE LEO TO 10 PCT "0000" TARGE? RATINGS, WHEREAS THE MONO
COVERAGE 1 N 1112-2 HAO ONLY 4 PCT RA?ED "GOOD ". I T I S POSSIBLE,
?HEREFORE, TO ATTRIBUTE A POR? t ON OF THE DECREASE TO A LACK OF STEREO
IN THE SECOND HALF OF THE MISSION. HOWEVER, MSN 1112-1 DID NOT HAVE
AN OUT ST ANO 1 NG PERCENT AGE OF GOOD P I R AT I NGSS COMPARED T D PAS? I NHER -
ERQLY POORER RESOLUTION CAMERA SYSTEMS. THE MAJOR CAUSE FOR THE
POOR P 1 RATINGS i S, AS NOT 1 CEO BY ? HE P1 S, THE SMALLER SCALE DUE TO
?HE HIGHER. AL? ITUDE. TO BETTER EVALUATE THIS ASPECT, AN ANALYSIS WAS
DONE ON ?HE PI SUITABILITY RATINGS CFOR PRIORI?Y ONE TGTS) FOR ALL
PAS? J-3 MSNS. THIS ANALYSIS ILLUSTRA?ES THAT THE AVG OF THE G000 Pt
RATINGS FOR MSNS WITH PERIGEE LOWER THAN 90NM WAS 20 PCT; WHILE THE AVG
t>F ?HE GOOD PI RATINGS FOR MSN WITH PERIGEE HIGHER ?HAN 90NM WAS 9.5
PCT; A SIGNIFICANT REDUCTION. OF THE LOWER THAN 90NM MSNS THE ONES
WITH THE LOWES? PERIGEE CI.E., NEAR SONM) HAD THE HIGHEST PERCENTAGE
OF G000 P 1 RATINGS OF ALL CORONA J-3 MSNS C I . E. , 1$, 23, 23 ANO 2$ PCT) �
FROM THESE PI SUITABILITY RATINGS IT IS CLEAR THAT THERE IS A DIRECT
RELATIONSHIP BETWEEN ALTITUDE OF PHOTOGRAPHY AND I T AB I L I TY . T O
IMPROVE THE P I SUITABILITY OF THE PHOTOGRAPHY, - i Su AI+~ THE PE? 25X1
RECOMMEND ?HAT ALL FUTURE CORONA MSNS BE FLOWN AT A PER I GEE ALTITUDE
OF SRNM.
~#. FWD LOOK 1 NG CAMERA NR 301
A. ANOMALYs A FOG PA?TERN IS PRESENT ON THE NINTH FR FROM THE
ENO OF MOST FWD CAMERA OPERA?ES AND ALSO ON THE SEVENTH FR FROM THE
END OF MOST AFT CAMERA OPERATES. THE DENSITY OF ?HESS FOG PATTERNS
IS COMhIENSURATE WITH CAMERA Si? PERIODS. DEGRADATION TO THE IMAGERY
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IS MINOR.
CAUSE: MOST LIKELY CAUSE: EXAMINATION OF THE FILM PATH OF
BOTH CAMERAS REVEALED THAT FOGGING OCCURRED IN THE VICINITY OF THE
FOREBOOY/FA tR I NG 1 NTERFACE.
ACT t ONs NONE RECOMMENDED.
B. ANOMALY s A 0. 1 INCH, TRIANGULAR , PLUS DENS 1 TY MARK I S
PRESENT AT A 6.25 INCH INTERVAL BEGINNING ON FR 26 OF PASS D04 AND
CONTINUES THROUGH FR 61 OF PASS 005. THIS MARK I S APPARENTLY THE
RESULT OF PHYSICAL PRESSURE FROM THE BASE SIDE OF THE FILM. A 0.05
INCH WIDE, LONGITUDINAL FILM BASE GOUGE,. ?/$ INCFI FROM THE TIME TRACK
EDGE OF THE FILM, 1 S CONTINUOUS FROM F'R 62 OF PASS 005 THROUGH FR 1
OF PASS 035. THIS BASE GOUGE STARTS 6.25 INCHES AFTER THE LAST TRi -
ANGUL AR SHAPED PLUS �ENS I T Y MARK THAT APPEAR EO ON FR 61 OF PASS 005.
AFTER FR 1 OF PASS D35, A SERIES OF MINOR BASE RUBS ARE PRESENT TO
THE END OF THE MSN.
CAUSE: ST ART 1 NG ON FR 26 OF PASS D 04, APART 1 CLE OF UNKNOWN
ORIGIN IMPRESSED THE FILM FROM THE BACK SIDE CAUSING A PLUS DENSITY
MARK EVERY 6.25 INCHES. MEASUREMENTS MADE ON RECOYEREO FILM INDICATE
THIS FOREIGN PARTICLE TO BE INITIALLY ON THE INPUT METERING ROLLER.
IT BECAME D ISLOOGEO FROM THE ROLLER ON FR 62 OF PASS D04 AND WAS
CARRIED BY THE FILM UNTIL IT AGAIN LODGED BETWEEN A FILM GUIDE AND
ROLLER.. IT REMAINED IN THIS AREA GOUGING THE FILM UN?iL PASS 035�
AT THIS TIME THE GOUGt NG CEASED BUT A "RUBBING" EFFECT WAS EVIDENT
THROUGHOUT THE REMAI HOER OF THE 1112-1 MATER i AL. THE 1112-2 MATER i AL,
APPROX ~0 INCHES, D i D NOT SHOW ANY ABRA I S I ONS OR RUBBING THAT COULD
BE CORRELATED WITH THE MARKING IN THE 1112-1 MISSION.
ACTION: NONE RECOMMENDED.
C. ANOMALY: A CREASE, BACK TO BACK, 9~ DEGREES TO THE MAJOR AXIS
AND EXTENDING ACROSS THE FILM WEB IS PRESENT ON FWD CAMERA FR 111 OF
PASS D05.
CAUSE s I NVEST i GAT I ON OF THE F 1 LM ANO T /M RECORDS DOES NOT
its i CATS A CAMERA SYSTEM ANOMALY. ?HE LOCAT t ON OF THE CREASE FROM
THE CENTER OF SCAN, PLACES THIS PORT t ON OF MATERIAL 1 N THE OUTPUT
SHUTTLE ASSEMBLY AT SHUTDOWN. THE ROLLERS AND SUBASSEMBLIES IN THIS
AREA DO NOT PROVIDE A REASONABLE SOI~CE FOR THIS TYPE OF ANOMALY. THE
TAPE RECORDER DATA FOR THE PER 100 OF TIME THAT THIS SECT i ON OF MATERIAL
PASSED THROUGH THE SYSTEM DOES NOT SHOW ANY ABNORMAL 1 T i ES THAT 1 N-
DICATE THE CREASING TOOK PLACE DURING OPERATION. IT IS THE OPINION
OF THE PET TEAM THAT THIS CREASE OCCUR ED I N POST FL 1 GHT HANDL i NG .
ACT I ONs NONE RECOMMEI~ED.
D. ANOMALY: HORIZON IMAGES ASSOCIATED WITH FR 135 OF PASS 006
WERE NOT IMAGED. THE LAST TWO FRS, 134 AND 135 OF PASS 006, ARE BOTH
CREEP FRS.
THE FOLLOWING ANOMALIES ARE ASSOCIATED WITH PASS 0866
C 1) FR 133 HAS NO T iME WORD, NO CAMERA NUMBER, AND NO SLURRED
TIME PULSE.
C2) FR 13~ HAS NO TIME WORD, NO CAMERA NUMBER, NO SLURRED TIME
PULSE, NO HORIZONS, AND WAS EXPOSED AT CREEP SCAN SPEED.
C3) FR 135 HAS NO TIME WORD, t+10 CAMERA NUMBER , NO SLURRED PULSE ~
AND WAS ALSO EXPOSED AT CREEP SCAN SPEED.
CAUSES THE LOSS OF A CENTER OF FORMAT PULSE RESULTED I N THE
MISSING AUXILIARY DATA AND THE TWO CREEP FRS. THE FWD INSTRUMENT WAS
G 1 YEN AN "OFF" COMMAND ON FR 133� FR 13~! SHOULD HAVE BEEN A ST OW
CYCLE; HOWEVER, THE I NSTRUNENT CONT I NUED TO OPERATE AT A CREEP RATE
UNT IL THE 20 SEC. RELAY DROPPED OUT POWER . THt S CARR i ED THE I NSTRU-
MENT TFIROUGH FR 135. T/M DATA ALSO VER I Fi ED THAT THE CENTER OF FORMAT
PULSE DID NOT OCCUR FROM THE SWITCH CLUSTER.
ACTION.: SWITCH CLUSTER FUNCTIONS ARE BE 1 NG REVER I F I ED ON RE-
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MA I NI NG SYSTEMS TO ASSURE PROPER SWITCH OVER -TRAVEL.
ANOMALY s FAILURE OF CAMERA N0. 301 AFTER CUT AND WRAP, REV 104.
PART ~ OF FR 83, ALL OF FR 84, AND FR $5 OF PASS D 1 a3 WERE THE ONLY FWO
FRS RECOVERED FROM THE FWD CAMERA ON MSN 1112-2. PART OF FR 82 AND
PAR? OF FR S3 MERE NOT RECOVERED CAPPR OX 36 t NCHES M i SS t NG) . FILM
AND T/M 1 NVEST tGAT I ON OUTL i NEO THE FOLLOW 1 NG PO i NTS s
C 1) CUT AND C i NCH APPEARED NORMAL.
C2) FIRST CYCLE OF OPERATION, AT REDUCED SPEED WAS NORMAL UNT I L
THE SCAN HEAD REACHED A POINT APPROX 15 DEGREES FROM PLATEN AREA.
AT THIS POINT A FILM JAM WAS NOTED.
C3) FR METERING ROLLER SLOWED DOWN.
t~l) FWD MOTOR VOLTAGE INCREASED.
C5) UNREG CURRENT INCREASED.
C6) 1 NPUT FUNCTIONS APPEARED NORMAL.
CAUSE t
(1) ?HE JAMMING, POSSIBLY CAUSED BY A FOREIGN OBJECT, RESULTED
IN A SHEARED PIN IN THE ST ARNIHEEL ASSEMBLY.
C2) THIS FAILURE RESULTS I N LOSS OF OUTPUT METERING.
C3) SWITCH CLUSTER FUNCTIONS CONT t NUED.
t4) i NPUT METERING CONT 1 NUED ?0 PASS FILM INTO THE INSTRUMENT,
OEYELOPED SLACK, AND EVENTUALLY WRAPPED ON THE 1 NPUT METERING ROLLER.
(5) AT THIS PO! NT THE CAMERA SYSTEM STALLED ANO WAS 1 NOPERAT I VE
FOR THE REMAII~?ER OF 1112-2.
ACT f ONs THE CR SYSTEMS ARE CLEANED AS ?HROUGHLY AS POSSIBLE
WI?H THE TECHNIQUES EMPLOYED, I.E., VIBRATION, VACUUM CLEANING ARID
THROUGH INSPECTION; HOWEVER, ?HERE. HAS BEEN IRREFUTABLE EVIDENCE TMA?
RESU)UE IS SOMETIMES LODGED I N AREAS I NACCESSABLE TO GROUND CLEANING.
THE ENVIRONMENTAL CONDITIONS A? LAUNCH TEND TO FREE THESE PARTICLES
IN THE VEHICLE. THE CLOSING OF CRITICAL AREAS I N ?HE CAMERA SYSTEM
TO GUARD AGAINST FLOATING PAR? 1 CLES HAS BEEN STUDI E0. ALTHOUGH THi S
COULD BE DONE, THE MERITS OF ?HfS REDESIGN ARE NOT CONSIDERED FEASIBLE
AT THIS PHASE OF Tim PROGRAM. NO AC?iON RECOMMENDED.
5. AFT LOOKING CAMERA NR 38i~J
A. ANOMALYs THE FOLLOIMING DEGRADATfONS WERE N0?EO ON THE AFT
INSTRUMENT FR 21 {LAS? FR) OF PASS 003 ANO FR 1 OF PASS 00~s
C1) OUTPUT A.O. FIDUCIALS ARE SMEARED.
C2) A.O. FORMAT l S OVERLAPPED INTO PASS D�4, FR 1.
C3) PHYSICAL EMUS i ON DIGS ARE PRESENT ON BOTH FILM EDGES.
C4) FR 21 I S APPROX 1 INCH LONGER THAN NORMAL.
C5) HEAVY FOG NEAR CENTER OF FORMAT FROM LENS STOW COPEN
SHUTTER ).
C6) SHARP EMULSION T 0 EMUSS i ON CREASE 99 DEGREES T D MAJOR
AXIS ON FR 1 OF PASS D04.
CAUSE t THE FOLLOWi NG SEQUENCE OF EVENTS i S SUBSTANT I A?EO BY
RECOVERED F 1 LM AND T /M INVESTIGATION t
C 1) CAMERA RECEIVED OFF COMMAND ON FR 20 OF PASS DeH3.
C2) DURING THE 1 NTERVAL BETWEEN FR 20 AND 21 THE 1 NSTRUMENT LOST
POWER AND ENTERED WHAT SHOULD HAVE BEEN ?HE CREEP FR AT A RA?E
SLIGHTLY SLOWER THAN OPERATIONAL SPEED.
C3) THE INSTRUMENT, WI?H POWER, COASTED THROUGH AND
SLIGHTLY BEYOND FR 21 WHERE 1 T CAME T 0 REST TEMPORARILY.
C~#) DURING THIS COAST 1 NG PERIOD I T FOLLOWS CFROM ?EST EXPER-
IENCE) THAT ?HE INPU? MATER t AL SMARTED TO WRAP UP ON THE i NPUT
METERING ROLLER OUE TO LACK OF TAKE-UP TENSION IN THE SYSTEM.
t5) FROM A PO I NT OF REST, SLIGHTLY BEYOND FR 21, THE i NSTRU-
MENT AIDED BY THE TENSION CREATED I N THE DOUBLE NEGATOR ASSEMBLY
OF THE SUPPLY CONSTAN? TENSION ASSEMBLY, WAS BACKED UP. THIS
REVERSAL UNCI NCHED THE MATERIAL I N THE INPUT METERING ROLLER.
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C6) THE SCAN HEAD CAME TO REST APPROX IN THE CENTER OF FORMAT
OF FR 21 AP10 REMAINED THERE UNTIL A CAMERA "ON" COMMAND WAS RE-
CE ! VED ON PASS D0~1.
C?) AFTER APPROX 20 CYCLES THE CAMERA SYSTEM RECOVERED ALL THE
SLACK MATERIAL AND CONT I NUEO NORMAL OPERATION.
CAUSE s MALFUNCTION OF 1 NTERNAL CONTACTS--K-$ RELAY C2H SEC
RELAY).
CONTACTS COULD HAVE s
C1) FAILED TO CLOSE AT START OF OPERATE.
C2) DROPPED OUT OUR I N6 OPERATE.
C3) DROPPED OUT AT OFF COMMAND.
ACTIONS INVESTIGATE FEASIBILITY OF A REDUNDANT CiRCU1T TO
REDUCE THE PROBABILITY OF A POWER LOSS AS A RESULT OF RELAY K-$
FAILURE. THIS MALFUNCTION WAS EXTREMELY SERIOUS ANO IN MOST CASES
WOULD HAYS BEEN CATASTROPHIC TO THE CAMERA. THE IMPORTANCE OF
CORRECTING THIS POTENTIAL FAILURE MODE CANNOT BE OVEREMPHASIZED.
B. ANOMALYt A 2.5 INCH CREASE, PARALLEL TO THE MAJOR AX 1 S OF
T e;E FI Lam, I S PRESENT ON FR 1 OF PASS 0103.
CAUSES THE CREASING WAS BARELY DETECTABLE. THERE WAS NO
PHYS 1 CAL DAMAGE ASSOC! ATED W1T~; THIS CREASE ANO AN OB I Vt OUS SYSTEM
CAUSE COULD NOi BE FOUND. TAPE RECORDER DATA I ND 1 CATEO NORMAL
SYSTEM OPERATION. THE CHARACTER 1 ST I CS OF ?HIS CREASE 1 N01 CATS
T HA? i T WAS PROBABLY DCGURREO DUR I :.G POST ~, I SS 10.. HA~.DL I NG.
ACT t ONs NONE RECAMMENDEO.
6. D 1 S I C CAMERA PERFORMANCE = POINT -YYPE STAR IMAGES WERE RECORDED
BY BOTH STELLAR CAMERAS. APPROX 25 STAR IMAGES WERE RECORDED ON PORT
FORMATS Aft APPROX. 5-10 STAR I~A~GES WERE RECORDED ON STBD FORMATS.
INDEX IMAGE QUALITY IS AVERAGE FOR HE DI SIC CAMERA SYSTEM.
7. DISK ANOMALIESt
A. ANOAAALY t TH 1 S 0 I S I C CAMERA FAILED TO OPERATE AFTER FR 32
OF PASS 1g7. THE D I S I C SYSTEM PERFORMED NORMALLY OUR 1 N6 THE 1112-1
PORTION OF THE MSN. IMMEDIATELY AFTER ?HE A-SRY TO B-SRY TRANSFER
AND DUR 1 NG A 7i CYCLE SL AYE-1 NDEPENDENT OPERA?ION, THE OI SI C CAMERA
FAILED WITH 32 CYCLES BEING COMPLETED.
OBSERVAT IONS OF POST FLIGHT DATAs
Ci) $3.'~'j INCHES OF STELLAR FL16FR FILM WAS ON THE 33~
TAKE UP- SPOOL.
C2) THE ~ INCH FL 1 GHT SPL i CE WAS NOT RECOVERED.
C3) APPROX TIC-50 INCHES OF ?HE TUNA LEADER WAS MISSING FROM
THE FI YE I Ntki SPOOL, 1 ND I CAT 1 NG MOVEMENT BACK TOWARD THE D 1 S 1 C
CAMERA.
C$) FAILURE OF THE TERRAIN TAKE-UP SPOOL AFTER 4 MINUTES
OF OPERAT I ON OUR i NG A POST FLIGHT ALT ITUOE TEST.
CAUSE t THE ABOVE DATA INDICATES THAT THE FL i G HT FAILURE
WAS CAUSED BY STOPPAGE OF THE TERRAIN TAKE-UP SPOOL. FAILURE TO
TAKE-UP THE FILM AS IT IS ME?EREO WILL CAUSE THE FILM TO WRAP
ITSELF AROUND THE METERING ROLLER, CAUSING THE DISK CAMERA TO JAM
ANO CEASE OPERAT I NG.
ACTIONS
RETURN THE RECOVERED DI S i C TAKE-UP SERIAL NUMBER 21 TO
ARBOR AND SUBJECT I T ? 0 AMBIENT AND ENY i ROt~utENT AL TESTS T O DETERM l NE
WHICH COMPONENT WAS RESPONS ! BLE FOR THE FA 1 LURE. CHANGES T O THE
REMAINING DISK TAKE-UP UNITS WILL BE BASED ON THESE TEST RESULTS.
B. AORMALLY s CORONA AND OENDR i T i C ST AT 1 C TRACES ARE PRESENT
OONT I NUOUSLY FROM PASS 3? TO THE BEG i NNI N6 OF PASS 48 ON THE TERRAI N
RECORfl OF THE 1112-i MSN. ALTHOUGH THE MARKS CONTINUE UNI NTERRUPTEO
FOR AI.L FRS 1 N THE AFFECTED SECTION, DEGRAOAT I ON TO THE i MAGERY ! S
ai 1 NOR CALL FRS PR t OR ? 0 PASS 3? AND FOLLOW 1 NG PASS $$ ARE CLEAR OF ANY

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MARKS OR ANOMALIES). THE MARKS APPEAR SIMILAR TO THOSE. OBSERVED AT
THE END OF MSN 11@7. THE MARKS APPEAR TO EMINATE FROM TWO SOURCES;
ONE ASSOCIATED WITH uPERATION ON ORBIT; THE OTHER FROM GROUND HANDLING.
CA~~HE BRANCH DISCHARGES ARE CHARACTER 1ST 1 C OF DE- 25X1
SPOOLING. EPORTS THAT MINOR STAT i C WAS OBSERVED AT THE T iME
OF DE�SPOOLI NG. THE OTHER CON? I NUOUS D 1 SCHARGE APPEARS TO HAYS 6EEN
CAUSED 8Y THE FILM RUBB i NG ON SOME CONT I ~UOUS SURFACE. THE MOST
LIKELY CAUSE FOR FILM RUB OF THIS NATURE IS A LOOP FORMED BY IMPRO-
PER/FILM TENSION, PROBABLY OUE TO A SLOW OISIC TAKE-UP.
ACT I ON s SEE ACTION UNDER PAR A 7A ABOVE .
8. SYSTEM At+dOMAL i ES:
A. AIr~MALY: OUR I NG CUT ANO WRAP DI SI C OPERATED FOR FOUR UN-
PR06RAMMED CYCLES. IT I S NORMALLY D 1 BAWLED DURING C/W.
CAUSE: A VOLT AGE APPEARED ON THE D 1 S I C COMMAND LINE
THROUGH A SNEAK CIRCUIT GENERATED AT THE PMU CONTROL. ENGINEER 1 NG
REVIEW CONFIRMED THE EXISTENCE OF THE SNEAK CIRCUIT. FAILURE
ANALYSIS ! ~ i CATED NO OTHER i LL EFFECT WOULD 6E INTRODUCED E 1 THER
?0 7HE 01 SI C OR THE CR INSTRUMENTS.
ACTIONS
C1) MODIFICATLON IS BEING INCORPORATED ON ALL FUTURE OISIC-
REQUI RED FLIGHT SYSTEMS.
C2) ADDITIONAL SYSTEMS TESTS, AS REQUIRED, TO VERIFY PROPER
COMMAND INTEGRITY WILL BE CONDUCTED. ACTION ITEM CLOSED WITH
ABO YE MOD I F 1 CAT t DNS.
B. ANOMALY: THE TAPE RECORDER FAILED AFTER APPROX 13 SECONDS
OF MSN 1112-2 OPERATION, RESULT i NG I N LOSS OF ALL i N-FLIGHT OPERA-
TIONAL DATA EXCEPT THAT ACQUIRED OVER TRACKING STATIONS.
CAUSE: IN THE INITIAL POST FLIGHT GROUND TEST, THE TAPE
RECORDER FAILED TO OPERATE IN THE "RECORD" MODE ANO WAS AP PEARETI.Y
JAMMED; HOWEVER, AFTER REVERSING DIRECTION THE JAM WAS CLEARED.
THE RECORDER WAS THEN OPERATED IN THE FOREWARD "RECORD" DIRECTION
ANO A FAILURE OCCURRED. iNYESTiGATION SHOWED THAT THE DRIVE BELT
HAD BROKEN, APPARENTLY CAUSED FROM PUNCTURE BY A SHARP OBJECT.
LOOSE FLAKES OF GLYPTOL WERE FOUND i N THE RECORDER AFTER D l SASSEMBLY.
THE FLIGHT FAILURE WAS APPARENTLY CAUSED BY A GLYPTOL CHIP WHICH
L ODGEO BETWEEN THE BELT OR I VE AND TRANSPORT CASE , JAMMING THE
TRANSPORT SYSTEM.
ACT t ON: THE FOLLOW i NG ITEMS WILL BE I NCORPOR ATED ON FUTURE
REWORK OF THE RECORDERS.
C 1) CHANGE MAX i MUM TAPE PACK 01 AMET ER FROM 2.975 T 0 2.9b5 1 NCHES .
(2) EL 1 M I NATE THE USE OF GLYPT OL i LATER NAL T 0 THE TAPE RECORDER .
C3) REVIEW AND CORRECT CLEAN ROOM PRACTICES.
9. CHARACTERISTIC ANOMALIES HAY 1 NG A M 1 NOR AFFEC? ON PERFORMANCE s
A. A FOG PA?TERN i S PRESENT ON THE FOURTH FR OF SOME CAMERA
OPERAT 1 DNS.
6. OUT OF FOCUS AREAS COMMON TO THE SYSTEM.
C. M 1 NOR, OENDR t T I C, EDGE STATIC TRACES ARE PRESENT ON PASS
D8? AND DSS. M 1 NOR, CORONA STATIC TRACES ARE PRESENT ON D90.
0. ROLLER/EQUIPMENT SHADOWGRAPHS ARE PRESENT 1 NTERM ITTENTLY
T HR 0 UGHOUT THE MSN.
ACT t ON: NONE.
16. OPEN PET ACTION ITEMS WERE 0 i SCUSSED. AC 1111-2 WAS CLOSED
WITH THE COMPLETION OF ANALYS 1 S 8Y PLUM CA/P Alm BOS ). CAUSE OF
SQU1 GGLE MARKS COULD NOT BE I SOLATEO. AC 1110-3 CPLUS DENS t TY SPOTS )
IS STILL UNDER 1 NVEST IGAT I ON. THESE SPOTS WERE PRESENT ON MSN 1112
WITH MAXiMIM OCCURRENCE BEING OBSERVED ON THE FIRST CAMERA OPERATION
FOLLOWING RECOVERY RETRO FtR I NG.
T O P S E C R E T
EPID OF MESSAGE GROUP ONE

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