LE M & R Records Center 334 Panel on High Altitude Detection” Folder The first several entries in the folder are reports from various authors on the jects of high altitude test detection and capabilities to perform tests in outer yace. The first report by Richard Latter, dated 21 January 59 is entitled “Detection f High Altitude Nuclear Explosions." He begins by noting that the Conference of eperts address some aspects of detecting outer space tests, at altitudes above 3-59 kilometers; they concluded it possidlo’in potlp.e to detect such explosions y various means includin> detection of prompt and delayed Gamma, detection of sutrons, visible light detection, and lonospheric disturbance detection, by a 2t of instruments on satellites and also on the surface. Latter points out that aformation from tests as well as studies done since the conference have indicated re methods may be different and not quite so easily used and that the question sally wesn't addressed out to deep space. His study addresses the various 2gimes of interest by altitude and concludes what he believes to be the most tkely possibilities for setting up a detection system as follows: detection of 2sts below a few hundred thousand kilometers by measurment of prompt Gamma rays 1a system of six satellites located at about six earth radii. Detection of tests ryond a few hundred thousand kilometers by measurement of x-rays on about three wtellites at an altitude of three to five hundred kilometers in the equatorial -ane. Use of solar and lunar satellites to detect ang detonations behind the m or moon, probably using x-ray detection. ° And finally ground based measurements > fonospheric disturbance for detecting explosions below one thousand kilometers.