Radar System Certificate; Requirement Of Calibration - Furuno WR-2100 Installation Manual

2. While installing antenna on a rooftop of building or build a tall tower in urban area.
Mount the radar on the stand or tower; it must be higher than any surrounding interception
(building, structure) for radar observation. The tower must be designed strong enough against
the heavy storms and severe weather conditions.
On the other hand, crane or aerial work platform vehicle might be necessary to mount the
radar and install the stand. It has to consider for the space to place crane and move its arm.
3. Consider the lightning protection and grounding:
Provide a lightning rod near around a protection area to improve lightning protection
performance based on JIS A 4201, JIS Z 9290 and IEC 62305. Refer the APPENDIX A.
The protection systems should include surge protectors/absorber.
The grounding system will typically consist of an underground grid, radials, or rods which
provide a ground resistance of not more than 1 ohm. It should have a connection point at the
base of the tower. Refer the APPENDIX A for more detail.
4. Confirm the antenna surrounding:
Do not interfere to any surrounding antenna (e.g.: Broadcast, mobile (cell) phone station,
radio, BS/CS, and so on) and no obstacles should be around the antenna.
5. Securing of power supply:
Radar needs AC100V (up to 240V), single phase 50/60Hz with GND. The minimum electric
current must be installed for using 100V is 10A, and 240V is 4.2A.
6. Securing of telecommunication line:
Use telecommunication line for transferring a weather observation data and operating the
radar by remote. The minimum require speed to transfer all data in real time is 8 Mbps or
faster constantly. The wireless network might have enough speed just for operating system
but we recommend you to use fast speed network like fiber optic network if possible.
7. Building/ground structure:
A place where to install the radar must have load resistance and durability to build a tower or
stand. However to build the tower on the building or make a tower, some location might
requires the structural calculation from professional architect.
8. Consider against the human health affection:
Build the radar stand at least 2 meter height if install the radar where people can easy to
trespass. It also has to set up a sign board at the entrance or ladder where can access near
the radar.
9. Heating and cooling system:
Air conditioning is necessary for keeping the stability of the temperature for the room/cabinet
(rack) of DPU.

1.7. Radar system certificate

Most of the country might be necessary to take the certificate of operating radar as a radio station
from own country by law. It belong with the radio spectrum that many radio services provide
functions ranging from air traffic control to amateur radio operations. Although the radio frequency
spectrum is not a consumable resource, the use of a frequency at a given location usually
prevents that frequency from being used by others in the same geographic area. It needs of
exclusive geographic use to preclude harmful interference has led to current spectrum regulations
the establish spectrum use rules, such as granting licenses for spectrum use, and partitioning the
spectrum for share use between radio services.
The certification is approving such as Ministry of Internal Affairs and Communications (Japan),
Federal Communications Commission (USA), or Federal agencies of the country. It has to apply
right after the location for installing the radar is decided because it will take time to get certification.
Some place might take a year.

1.8. Requirement of calibration

Calibration is the activity of checking or measuring by comparison with a standard, the accuracy of
a measuring instrument of any type. It may also include adjustment of the instrument to bring it into
alignment with the standard.
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