tLté‘i JOHNSTON ATOLL SCIENTIFIC F & SNO. TITLE USER STRUCTURE FACILITY NO. 01034 Angle Measuring Equipment (AME) Field TC - Subtask A961 SCIENTIFIC STATION NO. None | B00 91 -3-9 GO+90 FOO GO+90 FUNDING AGENCY DASA/ RDT&E EAO 1106-| 4101-61 ($000) ENGR PROC CONST TOTAL FURN PRE-GO Prior Cost 8.6 POST-GO Estimate 7/68 TOTAL 8.6 13.2 21.8 12.2 40.4 52.6 25.4 40.4 74,4 PRIOR YEARS ENGINEERING Completed. Drawings: 91-3-9-Al 91-3-9-Cl PROCUREMENT 91-3-9-S1 91-3-9-E] 91-3-9-W1) 91-097-SS101 Long lead items, mostly electrical equipment, have been procured Pre-GO for Post-GO construction. POST-GO PROCUREMENT Remaining procurement will be accomplished. CONSTRUCTION The AME Field will form an isosceles right triangle with 503-ft. legs. Surface material in the AME Field area will be homogeneous to a depth of at least six feet and the surface will be level to within + 2 inches. Thirteen concrete antenna pedestals will be constructed in recessedconcrete pipe wells. TC furnished antennas will be positioned on the pedestals to within first order survey accuracies both horizontally and vertically. Reflecting surfaces may not be located nearer than 200-ft. to the field edge; beyond this, they may not extend more than 2 degrees above the horizon in the north-south and 4 degrees in the east-west directions. A TC furnished AME Recording Van and a Shop Van will be located approximately 200-ft. north of the field. A multi-plate steel arch, covered with coral, will be erected over the AME Recording Van to provide protection. The arch will be approximately 45-ft. in length and will be open at both ends. The Shop Van will be unprotected. Two 72 kva, 4160-120/208 volt, 60 cycle, 3 phase transformers will provide utility power and instrument power to the two (2) trailers. VOL I 1-38 .