Here is a lengthy report from Doyle Northrup on Qe 4 March 58 entitled "Present and . long range Detection System" Z Al stentiel Capabilities and Limitations of the nd is e memorandum for the Chairman, ad hoc panel on Nuclear Test Limitation. The ntroduction notes that the Chairman of this so-called panel is Hans Bethe and this seport was presented to him on 5 February 1958 to discuss the capabilities of the ystem and its limitations in the detection of nuclear tests within the Soviet Union and elsewhere. It is addressed to tests anywhere from deep underground to 50,000 feet above the ground. as the acoustic Addressed are the general system capabilities and Operations as well component, the seismic component, the electromagnetic component, and the nuclear (air-borne sampling) component. The system whose capabilities are discussed . H) in detail is known as the “Long Range Detection System,