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NOTE TO GENERAL STARBIRD
THRU Colonel Hood
Captain Ho
P27. ME,
FROM CDR P. F. Bankhardt, USN
Deputy Chief, Test Branch
SUBJECT:
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Use of Bikini was not covered but the question was raised where-upon
Brig. General J. K. Hester directed that cost figures more complete than
those given by H&N ($25,500 +$10 per man day to reactivate Nan camp for
25 men for 30 days) be computed to be available should use of Bikini have
to be reconsidered.
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After the briefing, I discussed possible AEC objections and asked what is
the minimum error detectable by the safety monitor at Vandenberg AFB. This
Was not known but appears to be well over the error necessary to hit Fred
Island. ‘This discussion revealed that the missile body does not completely
burn up on re-entry. Retro rockets operate ar’CARED Of a
ation of the
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CLASSIFICATION CAHEELIED
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9 impacts were considAccuracy of 17 previous ATLAS firings was reviewed.
ered to have been within a one nautica ¥mile circle. There was one shot 9
mautical miles over, due to failure to cut off the fuel at the indicated
time, and an Atlantic shot was 275 miles short due to fuel cut-off by a
down range station 10 seconds too early.
(Lack of down range stations
gieliminates this danger on PMR.) Maximum error in azimuth nas been less
than 2 nautical miles.
REVIEWER D.
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and prediction of impact time to be within 1/10 second.
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ccuracy for these shots from Vandenberg AFB is predicted to be = 600 ft.
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At a previous briefing, in January, the computation of kill probability -“Sue :
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presented by STL for use of Mack tower as ground zero was considered
unsatisfactory. Standard methods of computation have now been used and
bs pikes :
ut 4 nautical miles northwest (as
the ground zero has been moved
inta bape e
mentioned in my note of 25 Feb 60), resulting in a reduction in kill
probability to 7.7 in one million, 1/3 of tke accepted kill probability
for usual missile launchings. An impact point another mile NW might be
preferred due to shallower water (for nose cone recovery). Use of that
GZ would further reduce kill probability to 6.2 per million; however,
errors are expected to be “overs" in range so the target will not be
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A briefing was held in the Joint War Room Annex in the Pentagon on the
Warhead Demonstration program, unclassified code name TICTOCK. L/Col. Eckramj
of HQ SAC made the presentation which included a slight change in scheduleof
and an explanation of safety factors or kill probability.
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