JOHNSTON ATOLL wenn F &SNO. TITLE 01072 Optical Station (Atop Building 20) - Subtask A804 USER STRUCTURE /FACILITY NO. SCIENTIFIC TC FUNDING AGENCY JTF -8 None ($000) BoD 91-3-17 ENGR PROC FOD CONST TOTAL FURN 445.8 510.4 5.7 14.2 14,2 460.0 524.6 6.1 234.2 240. 3 6.1 694. 2 764.9 PRE-GO MILCON Prior Cost CRO7-64 CRO7-65 FY 69 CRO 69-8 SCIENTIFIC STATION NO. SUBTOTAL 64.6 64.6 5.7 DASA/ RDT&E EAO-1106 PRE-GO Prior Cost 4101-61 TOTAL 64. 6 5.7 PRIOR YEARS ENGINEERING. Completed. Drawings: 91-3-17-Al thru A8 91-3-17-S1 thru S5 91-3-17-Ml1 thru M15 91-3-17-W1l 91-3-17-El thru E5 PROCUREMENT Completed. CONSTRUCTION The Optical Station (completed in 1966) is an "'U'' shaped steel frame structure with metal insulated siding and composition roof. This struc- ture is located at the north end, atop Building 20, and contains approximately 7500 square feet of space for spectrograph mounts, instrument maintenance, camera mounts; film handling and analysis, and administrative purposes. The camera and spectrographic areas, approximately 20 x 40-ft. and 40 x 40-ft., respectively, are provided with a movable roof which permits unobstructed sight down to a minimum of 10° above the horizontal to the south, east and west. A clear line-of-sight is provided between each spectrograph and an azimuth mark which, preferably, will be located on Hikina Island. Hydraulic camera mounts permit mounting of cameras and spectrographs to a predetermined position. These mounts are capable of adjustments to +t 0. 1° in azimuth. 1-66 VOLI April 1969