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