Chapter 2 EXPERIMENT DESIGN 2el INSTRUMENTATION The equipment consisted principally of automatic vertical-incid- ence ionosphere recorders, Model ©-2 and Model C~3, similar to each other in performance. The location of each of these recorders and its approximate distance from Bikini are indicated on a map (Fig. 2.1). izde 13s’e SOE 1es°e 00° ssw 30°N OKINAWA ¢ € + ENIWETOK B- BIKiNi R- RQNGERIK ' 120°€ T+ i3s'€ 150°C 16S 4 180° tes°w | Fig. 2.1 = Map Showing Location of Stations and Approximate Distances from Bikini. Zell In the Marshall. Islands & Model C-2 recorder was operated in a van locate? on Site Elmr (Eniwetok Atoll). A Hodel Ce3 recorder was operated in a van located near the southwestern end of Eniwetak Island, Rongerik dtoil. Zelez At Distant Locations Existing distant stations, which are part of a world-wide syetem, from which data were obtained for this report were the National Bureau of Standards stations on Guam and Maui and the Signal Corps stations on Okinawa and Adak. or a Oe3 recardere Each of these stations uses either a C-2 20 SECRET