Antenna Assembly Construction (Az Rotatable Structure)
Antenna Assembly Construction (Installation of snow cover) #12
Installation of snow prevention equipment (snow cover) is almost complete.
Aerial work platforms are required for installation, becouse the foundation height alone is 2m.
This is the inside of the snow cover.
This is the appearance of the antenna after the snow cover is attached.
Antenna Assembly Construction (Installation of snow cover) #11
We are installing snow cover equipment.
Snow covers are attached to prevent the antenna drive from stopping due to snow on the antenna rail surface.
Antenna Assembly Construction (Az Rotatable Structure) #10
The cover of the master collimator was attached.
In order to prevent thermal deformation due to the outside air, heat insulating materials are attached to the tower of the master collimator itself, and the outer circumference is covered with a cover. The diameter of it is about 2.5m.
Antenna Assembly Construction (Az Rotatable Structure) #9
The bearing of the EL rotatable structure, which is the top of the Az rotatable structure, has been installed.
It shows the assembly process in order of 1 second interval.
It shows that stairs and balconies for accessing the EL bearing are installed.
Antenna Assembly Construction (Az Rotatable Structure) #8
The assembly work of the Az rotatable structure is also approaching the final stage. From now on, the support structure part that receives the EL rotatable structure part (the tower-shaped one shown in the lower right of the photo below) will be placed on the top, but the upper curing and veranda are attached so that the work can be done safely. In parallel with this, the groundwork and gears of the EL (elevation) sector frame are roughly adjusted.
A panoramic view of the Az rotatable structure. This is the state where the antenna is seen from the back.
This is the side view of the antenna.
The photo below is adjusting the EL sector gear. There are two sets of sector frames, each of which has 20 gear parts. We survey from a distant reference point and adjust them one by one.
It is the adjustment scenery of the sector gear parts.
Antenna Assembly Construction (Az Rotatable Structure) #7
As the steel frame assembly of the antenna equipment room has progressed, the whole picture can be seen. We also installed a reflector switching chamber to switch the radio waves focused by the sub reflector from the main reflector in the direction of the observation device.
It is the steel frame assembly situation of the antenna equipment room.
This shows the groundwork of the reflector switching room.
Lifted to attach the reflector switching chamber
The reflector switching chamber is attached to the Az rotatable structure.
Antenna Assembly Construction (Az Rotatable Structure) #6
We are assembling the antenna equipment room and laying the bearing mounting part of the EL (elevation) rotating structure.
Carrying in the pole of the Az rotating structure
It shows the groundwork of the bearing mounting part of the EL rotatable structure part.
Assembling the foundation and pillars of the antenna equipment room. The antenna equipment room is a two-story building.
Antenna Assembly Construction (Az Rotatable Structure) #5
We have completed the assembly of a part of the Az rotating structure and the master collimator. After the assembly of the antenna equipment room is completed, the rest of the Az rotatable structure will be assembled.
Part of the Az rotating structure (white X-shaped column). The blue one in the center is the master collimator.
It is a panoramic view of the site. The front is a member of the Az rotating structure.
This is an enlarged photo of the master collimator. It looks like a rocket.
It is a panoramic photograph taken with a drone.
In order to install the equipment room, the scaffolding is removed, the cable winding mechanism is installed, and the master collimator is installed again.
Antenna Assembly Construction (Az Rotatable Structure) #4
Assembly of a 500-ton class 100m crane has begun. It takes 3 days to assemble.
Antenna Assembly Construction (Az Rotatable Structure) #3
A part of the master collimator, Az gear, and the Az rotatable structure are being assembled. You can see its size compared to the workers around.
Antenna Assembly Construction (Az Rotatable Structure) #2
On-site curing and assembly with a 200t 60m crane have been completed. The parts of the Az rotatable structure will finally be delivered from tomorrow.
Antenna Assembly Construction (Az Rotatable Structure) #1
Antenna assembly construction has started. A temporary office will be set up as a preparatory period from March 16 to March 31. The delivery and assembly of parts will start on April 1. Unfortunately, it has been snowing since March 21, but we are doing it while removing the snow.
The names of the parts that make up the antenna are shown in the figure below. We plan to carry out each assembly in the following period.
-Assembly of Az rotatable structure: Until the end of June 2018
-Assembly of EL rotatable structure: Until the end of September 2018
-Assembly of Reflector: Until the end of November 2018
