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APPENDIX B
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DETECTION OF HIGH ALTITUDE TESTS
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No experimental evidence exists so far on the effects of atomic
weapons tests at very high altitude (100,000 feet or more). Two tests
will be made during the HARDTACK Series, one at 125,000 and one at
250,000 feet. Jt is not certain whether these tests will succeed because
they require the successful firing of the rocket containing the atomic
weapon to be tested, followed by proper fusing of the weapon itself in an
unusual environment. If the tests are successful, we shall have a good
deal of experimental information on the effects of high altitude explosions
although much more will be required for complete knowledge. For the
present, we must rely entirely on theoretical calculations, and even
these are far less accurate and complete than they could be made if
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more time were available. Some of them in fact are estimates rather
than proper calculations, and all of them should be regarded with
caution until confirmed experimentally.
In spite of these uncertainties, it is already clear that there will
be a number of easily observable and characteristic effects on the ground
if stations are available within a reasonable distance (500 miles, say)
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If satellites are available, equipped with appropriate observation
observation and identification of high altitude nuclear tests
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equipment,
will be easy.
F4-152 43
BY.
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PORTIONS EXEMPTED
6-24)
E.Q. 12355, £20. dete JG
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NLE DATE _VtBi.
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DECLASSIFIED
E.0, 12355, SEC. 3.4 {b}
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