inns JOHNSTON ATOLL F &S NO. 01071 Log Periodic Ionospheric Antennas - Subtask A611 USER TC SCIENTIFIC TITLE STRUCTURE /FACILITY NO. . None FUNDING ($000) AGENCY DASA/ 4101-61 BoD 117-3-1, 2 and 3 ENGR PROC CONST FOOGO+120 TOTAL FURN . PRE-GO RDT&E EAO 1106-| SCIENTIFIC STATION NO. Prior Cost 3.5 3.5 POST-GO Est. 3/65 TOTAL 3.5 39.0 39.0 0.8 39.0 42.5 0.8 PRIOR YEARS ENGINEERING Completed. Drawings: 117-3-1-Ci 117-3-1-S1 117-3-Bl 117-1100-El POST -GO PROCUREMENT To be accomplished. CONSTRUCTION Three Log Periodic Ionospheric Antennas and ground screens, all TC furnished, will be placed on Hikina Island. Each antenna will be 100-ft. high and will have a ground screen of No. 10 copper wire approximately 110 x 300-ft. in plan dimension. Relative location of the three (3) antennas will not be critical; however, the antennas will be oriented 59 degrees true, 190 degrees true and 304 degrees true. The ground screen will extend into the sea. Support will be required to furnish concrete tower bases, longeron pads, guy anchors, wooden antenna anchor poles and to erect the TC furnished antenna kits. The kit includes the main tower, the radiating elements, all guys and embedded items and the ground plane. One antenna has been loaned to the AFCS by TC for erection and temporary use during the period the permanent AFCS antenna is being relocated from the main island. It has been erected in its permanent location for future use by TC; therefore, only two antennas remain for Post-GO installation. Two air conditioned 10 x 20-ft. office trailers will be provided; one by TC and one by the contractor. The facility will require 35 kw of 120/208 volt, 60 cycle, 3 phase electrical power. 1-65 SEs VOLI April 1969