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1.Support of Radio Shield Countermeasure Services
Today, the use of radio is an indispensable part of our daily lives in Japan. This increases the need to resolve obstruction to radio use caused by radio shield problems, including cut-offs of cellular phone calls when a person enters a tunnel, underground facility, etc.
Fur this purpose, the radio shield combating service aid financed by revenues from the spectrum user fee system was introduced in FY1999. This system supports services which install facilities to enable radio use in these areas as well.
1 Funded services
Services that install facilities in highway tunnels, underground shopping centers, and other man-made structures, in order to open an alternative radio communication route where the radio waves between the radio broadcaster and receiver are shielded and radio communication is cut off.
2 Body conducting funded services
Public legal persons
3 Percentage of funding, etc.
50% of costs are funded.
Details of funded services are determined for each fiscal year after considering the necessities, etc. of the radio usage situation, and will be decided as part of the fiscal budget of each year.
2.Maintenance and Operation of Standard Radio Facilities
Standard radio is for sending highly accurate standard radio waves via long wave band radio, and is used to maintain and improve the accuracy of radio frequency emitted from radio stations. It also serves as a standard for future frequency quality, leading the way to frequency allocation that is even more advanced than now.
For this purpose, standard radio facilities are being maintained in order to provide accurate frequencies to radio stations, etc. via standard radio wave.
Mt. Ootakadoya standard radio transmission center
| Transmission center | Mt. Ootakadoya Standard Frequency Station |
|---|---|
| Latitude, longitude | 37°22' N 140°51' E |
| Antenna power | 50kW (Effective radiant power: 10kW) |
| Antenna type | Umbrella shaped, 250m high |
| Type of radio wave | A1B |
| Operational hours | Non-stop |
| Standard frequency | Transmission wave: 40kHz Modulation wave: 1Hz Modulation amplitude: Max 100%, Min 10% |
| Frequency and accuracy of intervals | ±1x10-12 |
| Opening date | June 10, 1999 |
3.Studies for Ensuring Security of Radio Waves
As interest grows in the safety of radio station waves, studies are being conducted on ensuring radio wave safety for radio station operations, in order to contribute to safe radio station operations and management.
The studies of evaluation technologies concerning radio safety are conducted in cooperation with university researchers and other specialists, and include topics listed below:
1. Study on the effects of radio waves on the human body
2. Review of technology to accurately evaluate radio waves being absorbed by the human body
Activities (for both 1 and 2) include research into the effects of long term local exposure, epidemiology studies, as well as gathering the latest research reports on the effects of radio waves on the human body, review of risk management methods concerning the effect of radio waves on living beings
3. Study on information and skills necessary for radio station operation
Studies topics include the interest level, knowledge, and skill of radio station operators on radio wave protection, and other specific case studies concerning radio protection, and studies on government policies of other countries
4. Study on the effect of radio waves on medical equipment, etc.
After studies conducted in FY1995 and 1996, the situation has changed due to new cellular phone services and the improved functions of pacemakers and other medical equipment to eliminate obstructive radio waves. A new study is being conducted to monitor the effects of radio waves emitted from cellular phone terminals, etc. on medical equipment, etc.
