PREFACE This project was undertakenas a joint effort by members of the U.S. Naval Radiological Defense Laboraiury \USNRDL) and Cooper Development Corporation of Monrovia, California. The re- spensibilities of Cooper Development Corporation were defined in Bureau of Ships Contract, No. NObs 72000. These included responsibilities for the design, deveiopmen‘, and testing of the rockets used in the project, firing of the rockets 1n the field, recording of data from rockets fired in the field, and reduction of data, NRDL furnished field personnel, including a project officer, and was responsible for interpreting the reduced data as presented by the contractor. The project officer extends his thanks and appreciation to those .ndividuals and groups who through their cooperation and assistance contributed materially to the successful completion of the project. Their specific contributions are cited as follows: H.R. Wasson of USNRDL, who offered technical advice and assistance in the design and testing of the radiation transducer; Lieutenant (jg) M.H. Eklund of USNRDL, who prepared the gencral specifications for the radiation transducer, offered technical advice and performed the field calibration of the instruments; Captain and crew of the USS Knudson, APD-101, who assisted in the installation and operation of the shipboard telemetering receiving station; and Commanding Officer and men of Detachment A, Mobile Construction Battalion 5, who assisted in the installation of the rocket launching sta- tion and the Site Nan receiving station and performed the technical survey work.