AT THIS TIME (SANITIZED) DOES NOT AGREE TO THE RECOMMENDATION

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04558A001800050007-1
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Sequence Number: 7
• Content Type: CABLE

Approved For Release 2008/04/18: CIA-RDP78BO4558AO01800050007-1 25X1
T0PSFCCRET 162108Z
FRIORIT
CORONA
17 SEP 1963 OUT51873
23 37
1174 25X1
CJs
B. 3427 (IN 3599)
PISS A
1. AT THIS TIME DOES NOT AGREE TO THE RECOMMENDATION 25X1-
UNDER CONSIDERATION FOR DISABLING EITHER ONE SET OR BOTH SETS OF ACL
HORIZON CAMERAS FOR J-2. THE HORIZON CAMERAS, THOUGH THEY CONTINUE
Crace 'n" 3)
TO MALFUNCTION, ARE STILL NECESSARY FOR DETERMINATION 25X1
OF CAMERA ATTITUDE.
2. CAMERA ATTITUDE DATA IS ESSENTIAL FOR COMPLETE INTELLIGENCE
READOUT. ALTHOUGH THE STELLAR CAMERA IS IMPROVING IN ITS PER-
FORMANCE, IT IS NOT YET RELIABLE ENOUGH TO DEPEND UPON AS THE ONLY
SOURCE OF INFORMATION. DUE TO VARIOUS FAILURES IN THE HORIZON
CAMERAS HAS HAD TO USE BOTH FORWARD AND AFT HORIZONS
TO OBTAIN THE NECESSARY INFORMATION.
3. THE HORIZON CAMERAS HAVE BEEN USED IN MANY MISSIONS WITH
BOTH SUCCESS AND A VARIETY OF FAILURES, BUT ONLY ONCE HAS THE SHUTTER
REMAINED OPEN FOR AN EXTENDED TIME. RECENT TESTING AT (REF 25X1
C) SHOWS THAT THE CAMERAS HAVE NOT FAILED BY REMAINING OPEN FOR
ANY EXTENDED PERIOD. TO DISABLE THE HORIZON CAMERAS IS NOT THE
SOLUTION TO THE PROBLEM, BUT RATHER TO FIX THE CAMERAS AS WE
HAVE REQUESTED SEVERAL TIMES.
4. LISTED BELOW IS A BRIEF SUMMARY ON THE OPERATION OF THE ~.:.~
4,~'Oen':ee E ?u~a
TOP
'r}
Approved For Release 2008/04/18: CIA-RDP78BO4558AO01800050007-1
 Approved For Release 2008/04/18: CIA-RDP78BO4558AO01800050007-1
HORIZON CAMERAS FOR THE LAST FOUR MISSIONS:
9054 - FWD: ON 8 FRAMES SHUTTER FAILED TO OPEN. POOR QUALITY -
OUT OF FOCUS APPEARANCE. INADEQUATE EXPOSURE 50 PERCENT OF
ASCENDING PASSES ON PORT SIDE.
AFT: POOR QUALITY - OUT OF FOCUS APPEARANCE. OVER EXPOSED
ON DESCENDING PASSES. UNDER EXPOSED ON ASCENDING PASSES.
9056 - FWD: PORT SIDE NO IMAGES FOR WHOLE PASS - SHUTTER
CLOSED.
AFT: PORT SIDE SHUTTER MALFUNCTIONED INTERMITTANTLY.
STARBOARD CAMERA HAD 1 FIDUCIAL GO OUT AFTER FRAME 25 PASS D02.
9057 - FWD: SATSIFACTORY. ONLY 1 HORIZON USEABLE ON ASCENDING
PASSES.
AFT: SHUTTER FAILED TO OPEN ON MAJORITY OF FRAMES BOTH
PORT AND STARBOARD.
1001-1 FWD: PORT SHUTTER REMAINED OPEN ON APPROXIMATELY 80
PERCENT OF FRAMES AFTER PASS A34.
AFT: GOOD, ONLY 1 HORIZON USEABLE ON ASCENDING PASSES DUE
TO LOW SUN ANGLE.
5. IT IS CONCIEVABLE THAT DOES NOT SEE THE TOTAL PROBLEM,
BUT AT THIS TIME WE CAN NOT AGREE THAT A ONE TIME FAILURE IS CAUSE
FOR SHUTDOWN OF ONE OF THE KEY CAMERAS IN THIS SYSTEM.
T 0 P S E C R E T
END OF MESSAGE
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Approved For Release 2008/04/18: CIA-RDP78BO4558AO01800050007-1