This panel pubLished their first report on 16 March 1959 and it covered the ee range of detection from ten to the fifth to three times ten to the eighth kilometers. That report did not deal with the altitude up to fifty kilometers » which had been ZL Z covered by the 1958 Conference of Experts and stated that in the range “fron Sitooxks fifty to ten to the fifth kilometers, detection appeared to be technically feasible and Satellite systems would include this range but terrestial methods be less expensive. Following this initial report , it was felt that more detail was needed in the intermediate range and so the “Report on Detection in the Altitude Range 50-100, 000 kilometers," was published on 26 May 59 after review by the principal panel members and detailed discussions by various working groups. The report addresses in some detail the various methods of detection in this altitude regime, “by earth besed systems measuring visible light and electromagnetic effects, by satelli tes measuring the Argus Shell changes as well as other measurements, and various ways of measuring other disturbances. A "terrestial system" is proposed as an interim system with the most complete method coming later to be a satellite system at an altitude of about thirty thousand kilometers. The eadgenda of a 17 March 1959 meeting of the GAC Weapons Sub=Committee at LASL includes a discussion by Graves on horrors of underground and outer=apace testing. The agenda also includes £he a discussion by ALOO of the meke-up of the stockpile and which Lab has made which devices; a description of those weapons now in development at LASL; and possibiy a discussion of clean weapons. Jane Hall, who writes this memo within LASL notes that this list of subjects may be able to counteract certain impressions received by GAC members when the full committee visited Livermore in Huly 1958. 5