Wednesday, July 3, 1991

Corona 75

 1963-055A


The final KH-4 flight, M-26, was mission 9062. It was launched by a Thrust Augmented Thor Agena D from Vandenberg on 1963 Dec 21, and inserted a P-11 class subsatellite into orbit. The SRV was recovered in mid-air over the Pacific on Dec 26 after a 5 day flight, but once again corona static marred much of the film. The CIA technical representative had refused to approve M-26 for flight until incorrectly performed preflight environmental testing was repeated, but was overruled by the USAF (NRO Program A) manager, exacerbating the political mess between USAF and NRO. Nevertheless, much data was useable and it observed an ICBM site, a nuclear weapons bunker, rocket engine test facilities, and surface-to-air missile sites.

The NPIC PER (COR-2458) refers to the mission as Discoverer 74, the latest reference in an offical document to a Discoverer sequence number, and probably an error (it was removed in the longer alternate version of the same PER available in the National Archives).


KH-4 Mission 9062 
 

DateTimeEventOrbit  

1963 Dec 21  2145  Launch by TAT Agena D  V 75-1 Pad 2 
 2146  Castor sep 
 2147  Thor MECO (T+2:28) 
 2147  Thor VECO (T+2:37) 
 2147  Thor sep (T+2:42) 
 2147  Agena burn (T+2:50) 
 2151  Agena MECO (T+6:54)  89.98 184 x 371 x 64.88 (VCR) 
1963 Dec 21  2320?  Subsatellite ejected 
1963 Dec 22  89.7 178 x 337 x 64.8 (SATCAT) 
1963 Dec 22  0744   89.98 216 x 331 x 64.9 
1963 Dec 22  0700   89.96 176 x 355 x 64.52 (RAE) 
1963 Dec 23  1942   89.94 179 x 364 x 64.9 
1963 Dec 25  2109   89.83 179 x 353 x 64.9 
1963 Dec 26  2305?  SRV ejected, rev 81 or 80 
 2342  SRV recovered in mid-air
1963 Dec 28  0903   89.78 176 x 350 x 64.9 
1964 Jan 4  88.6 158 x 257 x 64.8 (SATCAT) 
1964 Jan 6  1809   88.64 157 x 257 x 64.8 
1964 Jan 8  2200? CORONA/Agena reentered 

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