CHAPTER II, SECTION 3
STATION:
SITE:
USER:
PURPOSE:
PARTICIPATION:
DESIGN PSI:
CONSTRUCTION:
J-1810
Johnston Island
NRL, LASL
Recording Shelter
J-40, J-41
None
5-8-58, 7-7-58
This station utilized a new structure in
joint occupancy with Station J-1030. The building was 48x64 feet, varying in height from 8 to
12 feet. A 12-inch-thick concrete slab supported the timber framed structure. The roof was
insulated with fiberboard sheets, and the exterior
walls were covered with plywood on the outside.
Station J-1810 occupied an area 25x64 feet and
one additional room. The room, Electronics
Room “A,” was 10x23 feet located adjacent to the
Photometric Room of Station J-1030. It con-
tained a double door at each end, one to the out-
side
was
was
was
and one to the Camera Room. The framing
exposed on two walls, but insulation board
placed on the two exterior walls. The room
air-conditioned.
The remainder of Station J-1810 was divided into two 64-foot-long rooms. The room
adjacent to and behind Station J-1030 and
Electronics Room “A” was the Camera Room.
The walls and ceiling of the room were covered
with insulation board. The room behind was the
Tracker Room, and the wall separating the two
rooms was constructed of 12-inch thick concrete
to a height of 5 feet. The wall contained thirteen
14-inch steel pipe sleeves 4 feet 144 inches on
centers with flanges on one end. Three sleeves
had flanges on both ends. A stud wall above the
concrete was sloped 1:1 toward the Camera
Room. This was done to provide sight from
points within the Tracker Room through the
roof to Stations 40 and 41. A light-tight entry
from outside was provided in one end of the
Camera Room, and the Camera Room was made
light-tight.
The Tracker Room floor was 1% inches
lower than the remainder of the building. The
walls and ceiling consisted of exposed framing.
The roof included a series of removable panels
over 4x9-foot openings which were lined with
14-inch pipe sleeves of the concrete wall. Wood
shutters, 3x4 feet, were placed in the rear wall
of the Tracker Room to providesight alignment
from the mirrors in the Tracker Room to Station
J-1812 light array on Sand Island. A track
assembly was provided on the floor of the room
to support User-furnished mirrors. The track
was constructed of steel angles the length of the
room. Entry to the Tracker Room was provided
at each end from the outside. This was the only
room of the building that was not air-condi-
tioned.
STATION:
J-1811
SITE:
Johnston Island
USER:
NRL, LASL
PURPOSE:
Thermal Radiation
Measuring
PARTICIPATION: J-40, J-41
DESIGN PSI:
None
CONSTRUCTION: 5-11-58,'5-30-58
This 6-inch-thick concrete slab was 20 feet
square. User-furnished shelters and motor generator sets were located on the slab.
STATION:
J-1812
SITE:
Sand Island (Johnston
Island
USER:
NRL,LASL
PURPOSE:
Aiming Light
PARTICIPATION: J-40, J-41
DESIGN PSI:
None
CONSTRUCTION: 4-14-58, 7-7-58
A 13-light array was placed 15 feet above
grade. It was utilized to provide a light source
for aligning the mirrors in Station 1810. The
array was mounted on three guyed wood poles.
Power was supplied from a 10-kw generator
placed at the station.
STATION:
J-3230.01
SITE:
Johnston Island
USER:
SC
PURPOSE:
Recording Station
PARTICIPATION: J-40, J-41
DESIGN PSI:
None
CONSTRUCTION: 5-1-58/7-7-58
Occupying a portion of existing Building
T-249, this station was located within the same
area as Stations 3241.01 and 3440.01. The space
was adjacent to that occupied by Station 613
and was 21x25 feet. Work benches were provided
along the walls for a length of 46 feet. Power
receptacles were located over the benches 2 feet
on centers. The room was air-conditioned by a
ceiling-hung unit which also fed air through a
duct passing Station 613 and into the equipment
room on the other end of the building. The end
room adjacent to the 21x25-foot room was 21x11
feet in size and was used to house instrument
racks. Existing wood studs in the area were removed, and three power receptacles were added,
as well as lights in this and other rooms of the
building.
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