on radiation intensity, the strength of the carrier signal, as received at the shipboard station, was recorded on aix channels of an oscillograph. Automatic readout equipment at the shipboard station was intended to record the six channels of information simultaneously on a logarithmic scale as a function of time. However, the equipment failed prior to the first event, probably due to overheating of components. Repair in the field was impossible since the components were imbedded in potting compound. 2.3 DATA REQUIREMENTS Data required to meet the objectives of the project consisted of general observations upon the working of the system and radiation intensity measurements as a function of rocket position. Supplementary data were also obtained on telemetering transmitter carrier field strength. The latter data were used as an aid in interpreting the primary data. Radiation intensity information was recorded on magnetic tape, while carrier field strength was recorded on oscillograph paper. Magnetic tapes containing the primary information were processed by Cooper Development Corporation at Monrovia, California. Simultaneous readout of six channels of information on the magnetic tapes was accomplished utilizing a six-channel discriminator capable of sorting out data in the presence of a high noise background. With the information thus obtained together with field strength records from the shipboard station, the rocket transmitters were identified with specific channels at a given time. The reduced data were presented in the form of radiationintensity readings as a function of time after launching. ai